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Polygon

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4158: 818: 447: 40: 4312: 246: 273:: any line drawn through the polygon (and not tangent to an edge or corner) meets its boundary exactly twice. As a consequence, all its interior angles are less than 180°. Equivalently, any line segment with endpoints on the boundary passes through only interior points between its endpoints. This condition is true for polygons in any geometry, not just Euclidean. 2635: 4228: 2661:
Considering the enclosed regions as point sets, we can find the area of the enclosed point set. This corresponds to the area of the plane covered by the polygon or to the area of one or more simple polygons having the same outline as the self-intersecting one. In the case of the cross-quadrilateral,
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The imaging system calls up the structure of polygons needed for the scene to be created from the database. This is transferred to active memory and finally, to the display system (screen, TV monitors etc.) so that the scene can be viewed. During this process, the imaging system renders polygons in
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is one which does not intersect itself. More precisely, the only allowed intersections among the line segments that make up the polygon are the shared endpoints of consecutive segments in the polygonal chain. A simple polygon is the boundary of a region of the plane that is called a
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of the region. For example, the central convex pentagon in the center of a pentagram has density 2. The two triangular regions of a cross-quadrilateral (like a figure 8) have opposite-signed densities, and adding their areas together can give a total area of zero for the whole
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correct perspective ready for transmission of the processed data to the display system. Although polygons are two-dimensional, through the system computer they are placed in a visual scene in the correct three-dimensional orientation.
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As with René Descartes's example of the chiliagon, the million-sided polygon has been used as an illustration of a well-defined concept that cannot be visualised. The megagon is also used as an illustration of the convergence of
780:, so the sum of the exterior angles must be 360°. This argument can be generalized to concave simple polygons, if external angles that turn in the opposite direction are subtracted from the total turned. Tracing around an 403:
The property of regularity may be defined in other ways: a polygon is regular if and only if it is both isogonal and isotoxal, or equivalently it is both cyclic and equilateral. A non-convex regular polygon is called a
951: 2303: 1203: 1013: 3231: 3150: 5687: 1547:-axis. If the vertices are ordered counterclockwise (that is, according to positive orientation), the signed area is positive; otherwise, it is negative. In either case, the area formula is correct in 1625: 580: 3428:
Exceptions exist for side counts that are easily expressed in verbal form (e.g. 20 and 30), or are used by non-mathematicians. Some special polygons also have their own names; for example the
2269: 709: 758: 615: 294:: the whole interior is visible from at least one point, without crossing any edge. The polygon must be simple, and may be convex or concave. All convex polygons are star-shaped. 4924: 276:
Non-convex: a line may be found which meets its boundary more than twice. Equivalently, there exists a line segment between two boundary points that passes outside the polygon.
4381: 2630:{\displaystyle A={\frac {ns^{2}}{4}}\cot {\frac {\pi }{n}}={\frac {ns^{2}}{4}}\cot {\frac {\alpha }{n-2}}=n\cdot \sin {\frac {\alpha }{n-2}}\cdot \cos {\frac {\alpha }{n-2}}.} 4483: 2167: 652: 3991:
To construct the name of a polygon with more than 20 and fewer than 100 edges, combine the prefixes as follows. The "kai" term applies to 13-gons and higher and was used by
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Some polygons of different kinds: open (excluding its boundary), boundary only (excluding interior), closed (including both boundary and interior), and self-intersecting.
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is a three-dimensional solid bounded by flat polygonal faces, analogous to a polygon in two dimensions. The corresponding shapes in four or higher dimensions are called
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gives a simple formula for the polygon's area based on the numbers of interior and boundary grid points: the former number plus one-half the latter number, minus 1.
4709: 3038: 3386:, the masculine adjective), meaning "many-angled". Individual polygons are named (and sometimes classified) according to the number of sides, combining a 5839:, Provides an interactive Java investigation that extends the interior angle sum formula for simple closed polygons to include crossed (complex) polygons 2653:
Using the formulas for simple polygons, we allow that particular regions within the polygon may have their area multiplied by a factor which we call the
2420:{\displaystyle A=R^{2}\cdot {\frac {n}{2}}\cdot \sin {\frac {2\pi }{n}}=R^{2}\cdot n\cdot \sin {\frac {\pi }{n}}\cdot \cos {\frac {\pi }{n}}} 2671:
Using the same convention for vertex coordinates as in the previous section, the coordinates of the centroid of a solid simple polygon are
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The simplest polygon which can cross itself; the simplest polygon which can be concave; the simplest polygon which can be non-cyclic. Can
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Reprint of original 1921 publication with corrected errata. Heath uses the Latinized spelling "Aristophonus" for the vase painter's name.
1395:{\displaystyle 16A^{2}=\sum _{i=0}^{n-1}\sum _{j=0}^{n-1}{\begin{vmatrix}Q_{i,j}&Q_{i,j+1}\\Q_{i+1,j}&Q_{i+1,j+1}\end{vmatrix}},} 2179:
The lengths of the sides of a polygon do not in general determine its area. However, if the polygon is simple and cyclic then the sides
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Arthur Baragar (2002) Constructions Using a Compass and Twice-Notched Straightedge, The American Mathematical Monthly, 109:2, 151–164,
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Beyond decagons (10-sided) and dodecagons (12-sided), mathematicians generally use numerical notation, for example 17-gon and 257-gon.
1184:{\displaystyle A={\frac {1}{2}}\sum _{i=0}^{n-1}(x_{i}y_{i+1}-x_{i+1}y_{i})\quad {\text{where }}x_{n}=x_{0}{\text{ and }}y_{n}=y_{0},} 3253:, a polygon having only two sides and two corners, which is impossible in a flat plane. Spherical polygons play an important role in 3283:
is an infinite sequence of sides and angles, which is not closed but has no ends because it extends indefinitely in both directions.
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is an area-connected or multiply-connected planar polygon with one external boundary and one or more interior boundaries (holes).
3156: 3075: 776:-gon, the angle "turned" at a corner is the exterior or external angle. Tracing all the way around the polygon makes one full 5671: 5427: 5239: 5079: 4742: 4683: 530:
triangles, each of which has an angle sum of π radians or 180 degrees. The measure of any interior angle of a convex regular
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Schirra, Stefan (2008). "How Reliable Are Practical Point-in-Polygon Strategies?". In Halperin, Dan; Mehlhorn, Kurt (eds.).
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representing the various elements (sides, vertices, etc.) and their connectivity. A real geometric polygon is said to be a
784:-gon in general, the sum of the exterior angles (the total amount one rotates at the vertices) can be any integer multiple 6405: 5818: 5259:
Benjamin, Elliot; Snyder, C. Mathematical Proceedings of the Cambridge Philosophical Society 156.3 (May 2014): 409–424.;
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of the plane. Commonly, the positive orientation is defined by the (counterclockwise) rotation that maps the positive
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of the associated abstract polygon. Depending on the mapping, all the generalizations described here can be realized.
5697:, Castellani Halls, Capitoline Museum, accessed 2013-11-11. Two pentagrams are visible near the center of the image, 5505: 5490: 5747: 476:
Any polygon has as many corners as it has sides. Each corner has several angles. The two most important ones are:
4844: 4673: 4380:, as well as other attributes of the polygon, such as color, shading and texture), connectivity information, and 3936: 4611: 4587: 4499: 4333: 4698:
B.Sz. Nagy, L. Rédey: Eine Verallgemeinerung der Inhaltsformel von Heron. Publ. Math. Debrecen 1, 42–50 (1949)
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Not generally recognised as a polygon, although some disciplines such as graph theory sometimes use the term.
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Algorithms - ESA 2008: 16th Annual European Symposium, Karlsruhe, Germany, September 15-17, 2008, Proceedings
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asserts that the first can be cut into polygonal pieces which can be reassembled to form the second polygon.
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The simplest polygon such that it is not known if the regular form can be constructed with neusis or not.
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is large, this approaches one half. Or, each vertex inside the square mesh connects four edges (lines).
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are used in any dimension, with the distinction between the two that a polytope is necessarily bounded.)
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The simplest polygon such that the regular form cannot be constructed with compass, straightedge, and
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is a circuit of arcs of great circles (sides) and vertices on the surface of a sphere. It allows the
2133: 628: 17: 2099:{\displaystyle {\begin{aligned}A={\frac {1}{2}}(a_{1}\\{}+a_{2}\\{}+\cdots +a_{n-2}).\end{aligned}}} 1487: 328:: a polygon which self-intersects in a regular way. A polygon cannot be both a star and star-shaped. 6428: 6022: 4592: 4329: 4246:, where the angles between the sides depend on the type of mineral from which the crystal is made. 3578: 3305: 2128: 1441: 31: 2112:
If the polygon can be drawn on an equally spaced grid such that all its vertices are grid points,
6398: 5947: 5733: 4322: 4204: 4000: 3010:{\displaystyle C_{y}={\frac {1}{6A}}\sum _{i=0}^{n-1}(y_{i}+y_{i+1})(x_{i}y_{i+1}-x_{i+1}y_{i}).} 2838:{\displaystyle C_{x}={\frac {1}{6A}}\sum _{i=0}^{n-1}(x_{i}+x_{i+1})(x_{i}y_{i+1}-x_{i+1}y_{i}),} 3241:
The idea of a polygon has been generalized in various ways. Some of the more important include:
801: 5972: 5857: 5307: 4430: 2191:-gons with a given perimeter, the one with the largest area is regular (and therefore cyclic). 423:: the polygon's sides meet at right angles, i.e. all its interior angles are 90 or 270 degrees. 102: 5661: 5635: 5574: 5402: 5034: 4640: 4635:
A new universal etymological technological, and pronouncing dictionary of the English language
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Not generally recognised as a polygon in the Euclidean plane, although it can exist as a
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lies inside a simple polygon given by a sequence of line segments. This is called the
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used in modelling and rendering. They are defined in a database, containing arrays of
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The simplest polygon which can exist as a regular star. A star pentagon is known as a
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Used as an example in some philosophical discussions, for example in Descartes's
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In this section, the vertices of the polygon under consideration are taken to be
777: 392: 350: 285: 187: 110: 4842:(2005). "The area of cyclic polygons: recent progress on Robbins' conjectures". 621:
were first studied by Poinsot, in the same paper in which he describes the four
288:: Non-convex and simple. There is at least one interior angle greater than 180°. 6906: 6353: 6333: 6298: 6293: 5924: 5904: 5260: 4652: 4514: 4504: 4196:
The first known systematic study of non-convex polygons in general was made by
3996: 3387: 3375: 3287: 3273: 2187:-gons with given side lengths, the one with the largest area is cyclic. Of all 1590: 1548: 1000: 805: 764: 511: 481: 396: 385: 356: 319: 279: 270: 218: 147: 5351:"Nominalism and constructivism in seventeenth-century mathematical philosophy" 5035:"Slaying a geometrical 'Monster': finding the area of a crossed Quadrilateral" 4867: 6981: 6923: 6811: 6804: 6797: 6761: 6754: 6747: 6711: 6704: 6328: 6179: 6072: 5992: 5934: 5792: 5367: 5350: 4806:"Dergiades, Nikolaos, "An elementary proof of the isoperimetric inequality", 4794:. translators: J Massalski and C Mills Jr. D C Heath and Company: Boston, MA. 4569: 3914: 3780: 3522: 3512: 3415: 3309: 3272:
does not lie in a flat plane, but zigzags in three (or more) dimensions. The
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is an infinite sequence of sides and angles that do not lie in a flat plane.
171:. In contexts where one is concerned only with simple and solid polygons, a 6863: 6358: 6228: 6184: 6148: 6138: 6133: 4564: 4554: 4539: 4388: 4174: 3804: 3771:
The simplest polygon such that the regular form cannot be constructed with
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Polygons may be characterized by their convexity or type of non-convexity:
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Polygons appear in rock formations, most commonly as the flat facets of
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The universal book of mathematics: from Abracadabra to Zeno's paradoxes
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squared triangles since there are two triangles in a square. There are
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of a simple polygon can also be computed if the lengths of the sides,
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Comparison of the different algorithms for Polygon Boolean operations
5797: 4858: 4281: 4170: 3977: 3944: 3901: 3646: 3539: 3439: 3406: 3280: 946:{\displaystyle (x_{0},y_{0}),(x_{1},y_{1}),\ldots ,(x_{n-1},y_{n-1})} 789: 5109:
Discrete and computational geometry: the Goodman-Pollack Festschrift
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Hass, Joel; Morgan, Frank (1996). "Geodesic nets on the 2-sphere".
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The signed area depends on the ordering of the vertices and of the
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generalized the idea of polygons to the complex plane, where each
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The simplest polygon which can exist in the Euclidean plane. Can
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A regular polygon with an infinite number of sides is a circle:
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can be defined in two different ways, giving different answers:
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Beyond measure: a guided tour through nature, myth, and number
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The area of a regular polygon is given in terms of the radius
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Grunbaum, B.; "Are your polyhedra the same as my polyhedra",
4186: 3611:"Nonagon" mixes Latin with Greek; "enneagon" is pure Greek. 3477: 3250: 94: 3999:
for clarity of concatenated prefix numbers in the naming of
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Grünbaum, B.; Are your polyhedra the same as my polyhedra?
4433:, it is often necessary to determine whether a given point 4250: 3226:{\displaystyle c_{y}={\frac {1}{n}}\sum _{i=0}^{n-1}y_{i}.} 3145:{\displaystyle c_{x}={\frac {1}{n}}\sum _{i=0}^{n-1}x_{i},} 175:
may refer only to a simple polygon or to a solid polygon.
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Cratere with the blinding of Polyphemus and a naval battle
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Chakerian, G. D. "A Distorted View of Geometry." Ch. 7 in
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Discrete and comput. geom: the Goodman-Pollack festschrift
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Polygons are primarily classified by the number of sides.
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On Understanding Understanding: A Philosophy of Knowledge
5555:, Continuum International Publishing Group, 2010, p. 26, 5234:. Springer Science & Business Media. pp. 88–90. 4292:, and the sides and base of each cell are also polygons. 4285: 953:
in order. For convenience in some formulas, the notation
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A polygon is a 2-dimensional example of the more general
76: 73: 3921:, have used the chiliagon as an example in discussions. 229:) 'corner' or 'angle'. It has been suggested that γόνυ ( 186:. Some sources also consider closed polygonal chains in 108:
The segments of a closed polygonal chain are called its
5833:, compares capabilities, speed and numerical robustness 5748:"direct3d rendering, based on vertices & triangles" 4610:, ed. Aronov et al. Springer (2003) pp. 461–488. ( 3573:
The simplest polygon such that the regular form is not
496: 300:: the boundary of the polygon crosses itself. The term 194:), even when the chain does not lie in a single plane. 3308:
analogous to an ordinary polygon, which exists in the
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How to draw monochrome orthogonal polygons on screens
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The New Elements of Mathematics: Algebra and Geometry
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comp.graphics.algorithms Frequently Asked Questions
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Polygons, types of polygons, and polygon properties
4596:, Methuen and Co., 1948 (3rd Edition, Dover, 1973). 4177:), appearing as early as the 7th century B.C. on a 61: 5415: 5223: 5221: 5219: 5217: 5215: 5213: 5211: 5209: 5207: 5205: 5203: 5201: 5199: 5197: 5195: 5015: 4477: 4165:Polygons have been known since ancient times. The 3225: 3144: 3032: 3009: 2837: 2629: 2453: 2434:-gon inscribed in a unit-radius circle, with side 2419: 2263: 2161: 2098: 1525: 1476: 1430: 1394: 1183: 999:If the polygon is non-self-intersecting (that is, 945: 752: 703: 646: 609: 575:{\displaystyle \left(1-{\tfrac {2}{n}}\right)\pi } 574: 178:A polygonal chain may cross over itself, creating 5837:Interior angle sum of polygons: a general formula 5616:, 2nd ed, Fordham University Press, 1993, p. 86, 5193: 5191: 5189: 5187: 5185: 5183: 5181: 5179: 5177: 5175: 4387:Any surface is modelled as a tessellation called 3276:of the regular polytopes are well known examples. 399:. The polygon is also equilateral and tangential. 201:in any number of dimensions. There are many more 6979: 5787: 5422:(Online-Ausg. ed.). New York: McGraw-Hill. 5123:Proceedings of the American Mathematical Society 4929: 4710:"Calculating The Area And Centroid Of A Polygon" 2264:{\displaystyle A={\tfrac {1}{2}}\cdot p\cdot r.} 2199:Many specialized formulas apply to the areas of 437:to L intersects the polygon not more than twice. 4249:Regular hexagons can occur when the cooling of 3985:A degenerate polygon of infinitely many sides. 2172:For any two simple polygons of equal area, the 2109:The formula was described by Lopshits in 1963. 772:to the interior angle. Tracing around a convex 5172: 3641:. However, it can be constructed with neusis. 6399: 5858: 5719:Shephard, G.C.; "Regular complex polytopes", 5111:, Ed. Aronov et al., Springer (2003), p. 464. 4789: 485:– The sum of the interior angles of a simple 388:. The polygon is also cyclic and equiangular. 261: 5639:, reprint edition, Routledge, 2004, p. 202, 5261:https://dx.doi.org/10.1017/S0305004113000753 5094: 5092: 5090: 5088: 3020:In these formulas, the signed value of area 2461:can also be expressed trigonometrically as: 5666:. Courier Dover Publications. p. 162. 5255: 5253: 5251: 5032: 4825:Robbins, "Polygons inscribed in a circle", 4740: 4169:were known to the ancient Greeks, with the 522:sides ) can be considered to be made up of 6406: 6392: 5865: 5851: 5503:Merrill, John Calhoun and Odell, S. Jack, 5270: 5268: 5120: 5070:(1995). "Lectures on Polytopes". Springer 4658:Noneuclidean tesselations and their groups 3447:Polygon names and miscellaneous properties 441: 5578:, Oxford University Press, 2006, p. 124, 5529:An Introduction to Philosophical Analysis 5413: 5366: 5318: 5316: 5297: 5295: 5293: 5291: 5289: 5287: 5134: 5085: 4857: 4352:Learn how and when to remove this message 4253:forms areas of tightly packed columns of 3581:. However, it can be constructed using a 155:. The interior of a solid polygon is its 5663:A History of Greek Mathematics, Volume 1 5471:, 2nd ed, Addison-Wesley, 1999. p. 505. 5383:Kant's Metaphysics and Theory of Science 5348: 5342: 5248: 4792:Computation of areas of oriented figures 4671: 4226: 4156: 816: 704:{\displaystyle {\tfrac {\pi (p-2q)}{p}}} 617:degrees. The interior angles of regular 445: 332: 244: 38: 6971:List of regular polytopes and compounds 5760: 5601:, Sadlier and Co., Boston, 1856, p. 27. 5494:, Loyola University Press, 1928, p. 18. 5448:, John Wiley & Sons, 2004. p. 249. 5436: 5265: 5227: 4783: 2297:can be expressed trigonometrically as: 753:{\displaystyle {\tfrac {180(p-2q)}{p}}} 14: 6980: 5313: 5284: 4910:Area of a regular polygon – derivation 4707: 4651: 4398:points (vertices) per side, there are 2662:it is treated as two simple triangles. 5846: 5788: 5656: 5399:The Philosophical Works of David Hume 5033:De Villiers, Michael (January 2015). 4631: 4008: 610:{\displaystyle 180-{\tfrac {360}{n}}} 27:Plane figure bounded by line segments 5710:, 3rd Edn, Dover (pbk), 1973, p. 114 5330:. The Math Forum – Drexel University 5114: 4334:adding citations to reliable sources 4305: 4295: 3382:), noun use of neuter of πολύγωνος ( 3065:of the vertex set of a polygon with 2640: 821:Coordinates of a non-convex pentagon 202: 5872: 4838: 4161:Historical image of polygons (1699) 3793:icosipentagon (or icosikaipentagon) 3346:. (In other conventions, the words 2194: 353:: both equilateral and equiangular. 347:: all edges are of the same length. 314:as one which exists in the complex 24: 5532:, 4th ed, Routledge, 1997, p. 56, 5401:, Volume 1, Black and Tait, 1826, 4942: 3846:heptacontagon (or hebdomecontagon) 3816:tetracontagon (or tessaracontagon) 3236: 988: 384:: all corners lie within the same 253: 25: 7004: 5781: 5723:Series 3 Volume 2, 1952, pp 82–97 5042:Learning and Teaching Mathematics 4678:. World Scientific. p. 258. 4638:. Oxford University. p. 404. 4402:squared squares in the mesh, or 2 4003:, though not all sources use it. 3740:enneadecagon (or enneakaidecagon) 792:and 0° for an angular "eight" or 304:is sometimes used in contrast to 240: 5468:College Algebra and Trigonometry 4310: 4173:, a non-convex regular polygon ( 3866:enneacontagon (or enenecontagon) 3826:pentacontagon (or pentecontagon) 2119:In every polygon with perimeter 1438:is the squared distance between 414: 395:: all sides lie within the same 205:defined for different purposes. 57: 5809:, with Greek Numerical Prefixes 5754: 5740: 5726: 5713: 5700: 5681: 5650: 5627: 5604: 5589: 5566: 5552:Key Terms in Philosophy of Mind 5543: 5520: 5497: 5482: 5459: 5407: 5391: 5385:, Manchester University Press, 5375: 5324:"Naming Polygons and Polyhedra" 5159: 5101: 5061: 5052: 5026: 4915: 4903: 4890: 4845:Advances in Applied Mathematics 4832: 4750:The College Mathematics Journal 4581: 4478:{\displaystyle P=(x_{0},y_{0})} 4321:needs additional citations for 4211:dimension is accompanied by an 3937:Meditations on First Philosophy 3856:octacontagon (or ogdoëcontagon) 2274:This radius is also termed its 2162:{\displaystyle p^{2}>4\pi A} 1121: 647:{\displaystyle {\tfrac {p}{q}}} 249:Some different types of polygon 5598:Fundamental Philosophy, Vol II 5280:10.1080/00029890.2002.11919848 4936: 4819: 4798: 4734: 4701: 4692: 4665: 4645: 4625: 4603:, CUP hbk (1997), pbk. (1999). 4500:Boolean operations on polygons 4472: 4446: 4112:heptaconta- (or hebdomeconta-) 4070:tetraconta- (or tessaraconta-) 3836:hexacontagon (or hexecontagon) 3001: 2943: 2940: 2908: 2829: 2771: 2768: 2736: 2086: 2083: 2080: 2061: 2036: 2002: 1999: 1961: 1927: 1901: 1879: 1866: 1847: 1825: 1822: 1771: 1737: 1711: 1689: 1676: 1657: 1644: 1551:. This is commonly called the 1526:{\displaystyle (x_{j},y_{j}).} 1517: 1491: 1471: 1445: 1118: 1060: 940: 902: 890: 864: 858: 832: 740: 725: 691: 676: 373:: all sides are tangent to an 359:: all corners lie on a single 341:: all corner angles are equal. 233:) 'knee' may be the origin of 13: 1: 5734:"opengl vertex specification" 5636:History of Western Philosophy 5575:The Rise of Modern Philosophy 5169:, Dover Edition (1973), p. 4. 5136:10.1090/S0002-9939-96-03492-2 5072:Graduate Texts in Mathematics 4827:American Mathematical Monthly 4743:"The Surveyor's Area Formula" 4576: 4418:vertices per triangle. Where 3069:vertices has the coordinates 1477:{\displaystyle (x_{i},y_{i})} 514:. This is because any simple 429:with respect to a given line 5815:, with interactive animation 5771:10.1007/978-3-540-87744-8_62 5231:The Computer Graphics Manual 4222: 4140:enneaconta- (or eneneconta-) 4084:pentaconta- (or penteconta-) 2289:-gon in terms of the radius 2278:and is often represented as 768:– The exterior angle is the 225:) 'much', 'many' and γωνία ( 208: 7: 4492: 4302:Polygon (computer graphics) 4257:, which may be seen at the 4126:octaconta- (or ogdoëconta-) 2666: 2183:determine the area. Of all 203:generalizations of polygons 190:to be a type of polygon (a 10: 7009: 6960: 6387: 4708:Bourke, Paul (July 1988). 4299: 4152: 4098:hexaconta- (or hexeconta-) 4042:icosi- (icosa- when alone) 3876:hectogon (or hecatontagon) 992: 662:), each interior angle is 658:-gon with central density 262:Convexity and intersection 184:self-intersecting polygons 29: 6281: 6227: 6167: 6111: 6050: 6041: 5933: 5885: 5506:Philosophy and Journalism 5488:McCormick, John Francis, 5381:Gottfried Martin (1955), 4912:from Math Open Reference. 4868:10.1016/j.aam.2004.08.006 4429:In computer graphics and 4280:, the surface of the wax 4056:triaconta- (or triconta-) 4033: 4024: 4016: 3358: 2647:self-intersecting polygon 788:of 360°, e.g. 720° for a 471: 6993:Euclidean plane geometry 5658:Heath, Sir Thomas Little 5509:, Longman, 1983, p. 47, 5414:Gibilisco, Stan (2003). 5368:10.1016/j.hm.2003.09.002 5349:Sepkoski, David (2005). 4618: 4376:(the coordinates of the 3579:compass and straightedge 2454:{\displaystyle \alpha ,} 2129:isoperimetric inequality 318:plane consisting of two 32:Polygon (disambiguation) 5721:Proc. London Math. Soc. 5228:Salomon, David (2011). 4391:. If a square mesh has 4205:Geoffrey Colin Shephard 3909:Philosophers including 1431:{\displaystyle Q_{i,j}} 812: 468:is assumed throughout. 442:Properties and formulas 5491:Scholastic Metaphysics 5308:Charles Sanders Peirce 5017: 4790:A.M. Lopshits (1963). 4672:Kappraff, Jay (2002). 4479: 4431:computational geometry 4239: 4162: 4001:quasiregular polyhedra 3259:Wythoff's construction 3227: 3209: 3146: 3128: 3034: 3011: 2907: 2839: 2735: 2631: 2455: 2430:The area of a regular 2421: 2285:The area of a regular 2265: 2174:Bolyai–Gerwien theorem 2163: 2100: 1543:-axis to the positive 1527: 1478: 1432: 1396: 1276: 1249: 1185: 1059: 947: 822: 754: 705: 648: 623:regular star polyhedra 611: 576: 462: 250: 139:sides; for example, a 103:closed polygonal chain 44: 5058:Coxeter (3rd Ed 1973) 5018: 4545:Polygon triangulation 4510:Constructible polygon 4480: 4230: 4200:in the 14th century. 4160: 3953:Constructible polygon 3895:Constructible polygon 3783:(or icosikaitetragon) 3721:Constructible polygon 3438:is also known as the 3329:partially ordered set 3228: 3183: 3147: 3102: 3035: 3012: 2881: 2840: 2709: 2632: 2456: 2422: 2266: 2164: 2101: 1528: 1479: 1433: 1397: 1250: 1223: 1186: 1033: 993:Further information: 948: 820: 755: 706: 649: 612: 577: 449: 333:Equality and symmetry 248: 42: 6098:Nonagon/Enneagon (9) 6028:Tangential trapezoid 5821:, by Herbert Glarner 5610:Potter, Vincent G., 5418:Geometry demystified 5355:Historia Mathematica 4925: 4829:102, June–July 1995. 4808:Forum Mathematicorum 4741:Bart Braden (1986). 4722:on 16 September 2012 4632:Craig, John (1849). 4437: 4378:geometrical vertices 4330:improve this article 3714:(or heptakaidecagon) 3688:(or pentakaidecagon) 3675:(or tetrakaidecagon) 3257:(map making) and in 3157: 3076: 3024: 2850: 2678: 2468: 2442: 2304: 2295:circumscribed circle 2225: 2134: 1621: 1488: 1442: 1409: 1204: 1014: 829: 715: 666: 629: 586: 538: 101:connected to form a 30:For other uses, see 6955:pentagonal polytope 6854:Uniform 10-polytope 6414:Fundamental convex 6210:Megagon (1,000,000) 5978:Isosceles trapezoid 5807:What Are Polyhedra? 5633:Russell, Bertrand, 5442:Darling, David J., 3995:, and advocated by 3765:(or icosikaitrigon) 3730:(or octakaidecagon) 3701:(or hexakaidecagon) 3662:(or triskaidecagon) 3583:neusis construction 3449: 3384:polygōnos/polugōnos 3380:polygōnon/polugōnon 2438:and interior angle 985:will also be used. 770:supplementary angle 6824:Uniform 9-polytope 6774:Uniform 8-polytope 6724:Uniform 7-polytope 6681:Uniform 6-polytope 6651:Uniform 5-polytope 6611:Uniform polychoron 6574:Uniform polyhedron 6422:in dimensions 2–10 6180:Icositetragon (24) 5790:Weisstein, Eric W. 5693:2013-11-12 at the 5465:Dugopolski, Mark, 5013: 4946: 4898:Mathematical Plums 4560:Synthetic geometry 4475: 4240: 4198:Thomas Bradwardine 4163: 3445: 3295:polygon with holes 3223: 3142: 3030: 3007: 2835: 2627: 2451: 2417: 2261: 2244: 2214:and its perimeter 2159: 2096: 2094: 1559:surveyor's formula 1523: 1474: 1428: 1392: 1383: 1181: 943: 823: 750: 748: 701: 699: 644: 642: 607: 605: 572: 562: 466:Euclidean geometry 463: 251: 159:, also known as a 135:is a polygon with 45: 6976: 6975: 6963:Polytope families 6420:uniform polytopes 6382: 6381: 6223: 6222: 6200:Myriagon (10,000) 6185:Triacontagon (30) 6149:Heptadecagon (17) 6139:Pentadecagon (15) 6134:Tetradecagon (14) 6073:Quadrilateral (4) 5943:Antiparallelogram 5708:Regular Polytopes 5706:Coxeter, H.S.M.; 5673:978-0-486-24073-2 5429:978-0-07-141650-4 5241:978-0-85729-886-7 5167:Regular polytopes 5165:Coxeter, H.S.M.; 5129:(12): 3843–3850. 5080:978-0-387-94365-7 4992: 4968: 4928: 4810:2, 2002, 129–130" 4685:978-981-02-4702-7 4641:Extract of p. 404 4593:Regular Polytopes 4550:Precision polygon 4368:, a polygon is a 4366:computer graphics 4362: 4361: 4354: 4296:Computer graphics 4191:Capitoline Museum 4150: 4149: 3989: 3988: 3487:spherical polygon 3263:uniform polyhedra 3247:spherical polygon 3181: 3100: 3033:{\displaystyle A} 2879: 2707: 2641:Self-intersecting 2622: 2595: 2562: 2538: 2513: 2497: 2415: 2396: 2358: 2334: 2243: 1642: 1614:are known, from: 1153: 1125: 1031: 794:antiparallelogram 747: 698: 641: 604: 561: 382:vertex-transitive 298:Self-intersecting 221:adjective πολύς ( 217:derives from the 16:(Redirected from 7000: 6967:Regular polytope 6528: 6517: 6506: 6465: 6408: 6401: 6394: 6385: 6384: 6195:Chiliagon (1000) 6175:Icositrigon (23) 6154:Octadecagon (18) 6144:Hexadecagon (16) 6048: 6047: 5867: 5860: 5853: 5844: 5843: 5803: 5802: 5775: 5774: 5758: 5752: 5751: 5744: 5738: 5737: 5730: 5724: 5717: 5711: 5704: 5698: 5685: 5679: 5677: 5654: 5648: 5631: 5625: 5608: 5602: 5593: 5587: 5572:Kenny, Anthony, 5570: 5564: 5547: 5541: 5524: 5518: 5501: 5495: 5486: 5480: 5463: 5457: 5440: 5434: 5433: 5421: 5411: 5405: 5395: 5389: 5379: 5373: 5372: 5370: 5346: 5340: 5339: 5337: 5335: 5320: 5311: 5299: 5282: 5272: 5263: 5257: 5246: 5245: 5225: 5170: 5163: 5157: 5156: 5138: 5118: 5112: 5105: 5099: 5096: 5083: 5065: 5059: 5056: 5050: 5049: 5039: 5030: 5024: 5022: 5020: 5019: 5014: 5012: 5011: 4993: 4988: 4980: 4969: 4961: 4956: 4955: 4945: 4919: 4913: 4907: 4901: 4894: 4888: 4887: 4861: 4836: 4830: 4823: 4817: 4816: 4814: 4802: 4796: 4795: 4787: 4781: 4780: 4778: 4772:. Archived from 4747: 4738: 4732: 4731: 4729: 4727: 4721: 4715:. Archived from 4714: 4705: 4699: 4696: 4690: 4689: 4669: 4663: 4662: 4649: 4643: 4639: 4629: 4530:List of polygons 4487:point in polygon 4484: 4482: 4481: 4476: 4471: 4470: 4458: 4457: 4417: 4397: 4357: 4350: 4346: 4343: 4337: 4314: 4306: 4267:Devil's Postpile 4263:Northern Ireland 4259:Giant's Causeway 4237:Northern Ireland 4233:Giant's Causeway 4217:complex polygons 4167:regular polygons 4006: 4005: 3970:regular polygons 3450: 3444: 3422:are exceptions. 3394:with the suffix 3392:numerical prefix 3327:is an algebraic 3325:abstract polygon 3232: 3230: 3229: 3224: 3219: 3218: 3208: 3197: 3182: 3174: 3169: 3168: 3151: 3149: 3148: 3143: 3138: 3137: 3127: 3116: 3101: 3093: 3088: 3087: 3068: 3060: 3053: 3039: 3037: 3036: 3031: 3016: 3014: 3013: 3008: 3000: 2999: 2990: 2989: 2971: 2970: 2955: 2954: 2939: 2938: 2920: 2919: 2906: 2895: 2880: 2878: 2867: 2862: 2861: 2844: 2842: 2841: 2836: 2828: 2827: 2818: 2817: 2799: 2798: 2783: 2782: 2767: 2766: 2748: 2747: 2734: 2723: 2708: 2706: 2695: 2690: 2689: 2636: 2634: 2633: 2628: 2623: 2621: 2607: 2596: 2594: 2580: 2563: 2561: 2547: 2539: 2534: 2533: 2532: 2519: 2514: 2506: 2498: 2493: 2492: 2491: 2478: 2460: 2458: 2457: 2452: 2426: 2424: 2423: 2418: 2416: 2408: 2397: 2389: 2372: 2371: 2359: 2354: 2346: 2335: 2327: 2322: 2321: 2270: 2268: 2267: 2262: 2245: 2236: 2212:inscribed circle 2201:regular polygons 2195:Regular polygons 2168: 2166: 2165: 2160: 2146: 2145: 2105: 2103: 2102: 2097: 2095: 2079: 2078: 2054: 2053: 2035: 2034: 2010: 1998: 1997: 1973: 1972: 1954: 1953: 1926: 1925: 1913: 1912: 1894: 1893: 1878: 1877: 1859: 1858: 1846: 1845: 1833: 1821: 1820: 1796: 1795: 1783: 1782: 1764: 1763: 1736: 1735: 1723: 1722: 1704: 1703: 1688: 1687: 1669: 1668: 1656: 1655: 1643: 1635: 1554:shoelace formula 1546: 1542: 1532: 1530: 1529: 1524: 1516: 1515: 1503: 1502: 1483: 1481: 1480: 1475: 1470: 1469: 1457: 1456: 1437: 1435: 1434: 1429: 1427: 1426: 1401: 1399: 1398: 1393: 1388: 1387: 1380: 1379: 1350: 1349: 1324: 1323: 1300: 1299: 1275: 1264: 1248: 1237: 1219: 1218: 1190: 1188: 1187: 1182: 1177: 1176: 1164: 1163: 1154: 1151: 1149: 1148: 1136: 1135: 1126: 1123: 1117: 1116: 1107: 1106: 1088: 1087: 1072: 1071: 1058: 1047: 1032: 1024: 995:Shoelace formula 984: 952: 950: 949: 944: 939: 938: 920: 919: 889: 888: 876: 875: 857: 856: 844: 843: 759: 757: 756: 751: 749: 743: 720: 710: 708: 707: 702: 700: 694: 671: 653: 651: 650: 645: 643: 634: 625:: for a regular 616: 614: 613: 608: 606: 597: 581: 579: 578: 573: 568: 564: 563: 554: 529: 510: 499: 460: 450:Partitioning an 375:inscribed circle 162:polygonal region 89: 88: 85: 84: 81: 78: 75: 72: 69: 66: 63: 21: 7008: 7007: 7003: 7002: 7001: 6999: 6998: 6997: 6978: 6977: 6946: 6939: 6932: 6815: 6808: 6801: 6765: 6758: 6751: 6715: 6708: 6542:Regular polygon 6535: 6526: 6519: 6515: 6508: 6504: 6495: 6486: 6479: 6475: 6463: 6457: 6453: 6441: 6423: 6412: 6383: 6378: 6277: 6231: 6219: 6163: 6129:Tridecagon (13) 6119:Hendecagon (11) 6107: 6043: 6037: 6008:Right trapezoid 5929: 5881: 5871: 5784: 5779: 5778: 5759: 5755: 5746: 5745: 5741: 5732: 5731: 5727: 5718: 5714: 5705: 5701: 5695:Wayback Machine 5686: 5682: 5674: 5655: 5651: 5632: 5628: 5609: 5605: 5595:Balmes, James, 5594: 5590: 5571: 5567: 5548: 5544: 5526:Hospers, John, 5525: 5521: 5502: 5498: 5487: 5483: 5464: 5460: 5441: 5437: 5430: 5412: 5408: 5396: 5392: 5380: 5376: 5347: 5343: 5333: 5331: 5322: 5321: 5314: 5300: 5285: 5273: 5266: 5258: 5249: 5242: 5226: 5173: 5164: 5160: 5119: 5115: 5106: 5102: 5097: 5086: 5066: 5062: 5057: 5053: 5037: 5031: 5027: 5007: 5003: 4981: 4979: 4960: 4951: 4947: 4932: 4926: 4923: 4922: 4920: 4916: 4908: 4904: 4895: 4891: 4837: 4833: 4824: 4820: 4812: 4804: 4803: 4799: 4788: 4784: 4776: 4762:10.2307/2686282 4745: 4739: 4735: 4725: 4723: 4719: 4712: 4706: 4702: 4697: 4693: 4686: 4670: 4666: 4653:Magnus, Wilhelm 4650: 4646: 4630: 4626: 4621: 4588:Coxeter, H.S.M. 4584: 4579: 4574: 4520:Geometric shape 4495: 4466: 4462: 4453: 4449: 4438: 4435: 4434: 4407: 4392: 4358: 4347: 4341: 4338: 4327: 4315: 4304: 4298: 4288:is an array of 4225: 4215:one, to create 4189:and now in the 4155: 3649:(or duodecagon) 3639:angle trisector 3374:(a noun), from 3361: 3302:complex polygon 3274:Petrie polygons 3239: 3237:Generalizations 3214: 3210: 3198: 3187: 3173: 3164: 3160: 3158: 3155: 3154: 3133: 3129: 3117: 3106: 3092: 3083: 3079: 3077: 3074: 3073: 3066: 3055: 3048: 3025: 3022: 3021: 2995: 2991: 2979: 2975: 2960: 2956: 2950: 2946: 2928: 2924: 2915: 2911: 2896: 2885: 2871: 2866: 2857: 2853: 2851: 2848: 2847: 2823: 2819: 2807: 2803: 2788: 2784: 2778: 2774: 2756: 2752: 2743: 2739: 2724: 2713: 2699: 2694: 2685: 2681: 2679: 2676: 2675: 2669: 2643: 2611: 2606: 2584: 2579: 2551: 2546: 2528: 2524: 2520: 2518: 2505: 2487: 2483: 2479: 2477: 2469: 2466: 2465: 2443: 2440: 2439: 2407: 2388: 2367: 2363: 2347: 2345: 2326: 2317: 2313: 2305: 2302: 2301: 2234: 2226: 2223: 2222: 2197: 2141: 2137: 2135: 2132: 2131: 2093: 2092: 2068: 2064: 2043: 2039: 2024: 2020: 2009: 2006: 2005: 1987: 1983: 1968: 1964: 1943: 1939: 1921: 1917: 1908: 1904: 1889: 1885: 1873: 1869: 1854: 1850: 1841: 1837: 1832: 1829: 1828: 1810: 1806: 1791: 1787: 1778: 1774: 1753: 1749: 1731: 1727: 1718: 1714: 1699: 1695: 1683: 1679: 1664: 1660: 1651: 1647: 1634: 1624: 1622: 1619: 1618: 1612: 1606: 1599: 1591:exterior angles 1587: 1581: 1574: 1544: 1540: 1511: 1507: 1498: 1494: 1489: 1486: 1485: 1465: 1461: 1452: 1448: 1443: 1440: 1439: 1416: 1412: 1410: 1407: 1406: 1382: 1381: 1357: 1353: 1351: 1333: 1329: 1326: 1325: 1307: 1303: 1301: 1289: 1285: 1278: 1277: 1265: 1254: 1238: 1227: 1214: 1210: 1205: 1202: 1201: 1172: 1168: 1159: 1155: 1152: and  1150: 1144: 1140: 1131: 1127: 1122: 1112: 1108: 1096: 1092: 1077: 1073: 1067: 1063: 1048: 1037: 1023: 1015: 1012: 1011: 997: 991: 989:Simple polygons 982: 975: 967: 960: 954: 928: 924: 909: 905: 884: 880: 871: 867: 852: 848: 839: 835: 830: 827: 826: 815: 808:of the polygon. 721: 718: 716: 713: 712: 672: 669: 667: 664: 663: 632: 630: 627: 626: 595: 587: 584: 583: 552: 545: 541: 539: 536: 535: 523: 504: 490: 474: 455: 444: 417: 393:edge-transitive 335: 311:complex polygon 264: 256: 254:Number of sides 243: 211: 188:Euclidean space 60: 56: 35: 28: 23: 22: 15: 12: 11: 5: 7006: 6996: 6995: 6990: 6974: 6973: 6958: 6957: 6948: 6944: 6937: 6930: 6926: 6917: 6900: 6891: 6880: 6879: 6877: 6875: 6870: 6861: 6856: 6850: 6849: 6847: 6845: 6840: 6831: 6826: 6820: 6819: 6817: 6813: 6806: 6799: 6795: 6790: 6781: 6776: 6770: 6769: 6767: 6763: 6756: 6749: 6745: 6740: 6731: 6726: 6720: 6719: 6717: 6713: 6706: 6702: 6697: 6688: 6683: 6677: 6676: 6674: 6672: 6667: 6658: 6653: 6647: 6646: 6637: 6632: 6627: 6618: 6613: 6607: 6606: 6597: 6595: 6590: 6581: 6576: 6570: 6569: 6564: 6559: 6554: 6549: 6544: 6538: 6537: 6533: 6529: 6524: 6513: 6502: 6493: 6484: 6477: 6471: 6461: 6455: 6449: 6443: 6437: 6431: 6425: 6424: 6413: 6411: 6410: 6403: 6396: 6388: 6380: 6379: 6377: 6376: 6371: 6366: 6361: 6356: 6351: 6346: 6341: 6336: 6334:Pseudotriangle 6331: 6326: 6321: 6316: 6311: 6306: 6301: 6296: 6291: 6285: 6283: 6279: 6278: 6276: 6275: 6270: 6265: 6260: 6255: 6250: 6245: 6240: 6234: 6232: 6225: 6224: 6221: 6220: 6218: 6217: 6212: 6207: 6202: 6197: 6192: 6187: 6182: 6177: 6171: 6169: 6165: 6164: 6162: 6161: 6156: 6151: 6146: 6141: 6136: 6131: 6126: 6124:Dodecagon (12) 6121: 6115: 6113: 6109: 6108: 6106: 6105: 6100: 6095: 6090: 6085: 6080: 6075: 6070: 6065: 6060: 6054: 6052: 6045: 6039: 6038: 6036: 6035: 6030: 6025: 6020: 6015: 6010: 6005: 6000: 5995: 5990: 5985: 5980: 5975: 5970: 5965: 5960: 5955: 5950: 5945: 5939: 5937: 5935:Quadrilaterals 5931: 5930: 5928: 5927: 5922: 5917: 5912: 5907: 5902: 5897: 5891: 5889: 5883: 5882: 5870: 5869: 5862: 5855: 5847: 5841: 5840: 5834: 5828: 5822: 5816: 5810: 5804: 5783: 5782:External links 5780: 5777: 5776: 5753: 5739: 5725: 5712: 5699: 5680: 5672: 5649: 5626: 5603: 5588: 5565: 5549:Mandik, Pete, 5542: 5519: 5496: 5481: 5458: 5435: 5428: 5406: 5390: 5374: 5341: 5312: 5283: 5264: 5247: 5240: 5171: 5158: 5113: 5100: 5084: 5068:Günter Ziegler 5060: 5051: 5025: 5010: 5006: 5002: 4999: 4996: 4991: 4987: 4984: 4978: 4975: 4972: 4967: 4964: 4959: 4954: 4950: 4944: 4941: 4938: 4935: 4931: 4914: 4902: 4889: 4852:(4): 690–696. 4831: 4818: 4797: 4782: 4779:on 2012-11-07. 4756:(4): 326–337. 4733: 4700: 4691: 4684: 4664: 4644: 4623: 4622: 4620: 4617: 4616: 4615: 4604: 4599:Cromwell, P.; 4597: 4583: 4580: 4578: 4575: 4573: 4572: 4567: 4562: 4557: 4552: 4547: 4542: 4537: 4532: 4527: 4522: 4517: 4515:Cyclic polygon 4512: 4507: 4505:Complete graph 4502: 4496: 4494: 4491: 4474: 4469: 4465: 4461: 4456: 4452: 4448: 4445: 4442: 4360: 4359: 4318: 4316: 4309: 4300:Main article: 4297: 4294: 4224: 4221: 4154: 4151: 4148: 4147: 4144: 4141: 4138: 4134: 4133: 4130: 4127: 4124: 4120: 4119: 4116: 4113: 4110: 4106: 4105: 4102: 4099: 4096: 4092: 4091: 4088: 4085: 4082: 4078: 4077: 4074: 4071: 4068: 4064: 4063: 4060: 4057: 4054: 4050: 4049: 4046: 4043: 4040: 4036: 4035: 4032: 4029: 4026: 4022: 4021: 4018: 4015: 4010: 3997:John H. Conway 3987: 3986: 3983: 3980: 3974: 3973: 3965: 3962: 3956: 3955: 3950: 3947: 3941: 3940: 3932: 3929: 3923: 3922: 3911:René Descartes 3907: 3904: 3898: 3897: 3892: 3889: 3883: 3882: 3880: 3877: 3873: 3872: 3870: 3867: 3863: 3862: 3860: 3857: 3853: 3852: 3850: 3847: 3843: 3842: 3840: 3837: 3833: 3832: 3830: 3827: 3823: 3822: 3820: 3817: 3813: 3812: 3810: 3807: 3801: 3800: 3797: 3794: 3790: 3789: 3787: 3784: 3777: 3776: 3769: 3766: 3759: 3758: 3756: 3753: 3747: 3746: 3744: 3741: 3737: 3736: 3734: 3731: 3724: 3723: 3718: 3715: 3708: 3707: 3705: 3702: 3695: 3694: 3692: 3689: 3682: 3681: 3679: 3676: 3669: 3668: 3666: 3663: 3656: 3655: 3653: 3650: 3643: 3642: 3635: 3632: 3631:(or undecagon) 3625: 3624: 3622: 3619: 3613: 3612: 3609: 3606: 3599: 3598: 3596: 3593: 3587: 3586: 3571: 3568: 3561: 3560: 3553: 3550: 3544: 3543: 3536: 3533: 3527: 3526: 3519: 3516: 3509: 3508: 3501: 3498: 3491: 3490: 3483: 3480: 3474: 3473: 3470: 3467: 3461: 3460: 3457: 3454: 3360: 3357: 3356: 3355: 3336: 3321: 3298: 3291: 3288:skew apeirogon 3284: 3277: 3266: 3238: 3235: 3234: 3233: 3222: 3217: 3213: 3207: 3204: 3201: 3196: 3193: 3190: 3186: 3180: 3177: 3172: 3167: 3163: 3152: 3141: 3136: 3132: 3126: 3123: 3120: 3115: 3112: 3109: 3105: 3099: 3096: 3091: 3086: 3082: 3040:must be used. 3029: 3018: 3017: 3006: 3003: 2998: 2994: 2988: 2985: 2982: 2978: 2974: 2969: 2966: 2963: 2959: 2953: 2949: 2945: 2942: 2937: 2934: 2931: 2927: 2923: 2918: 2914: 2910: 2905: 2902: 2899: 2894: 2891: 2888: 2884: 2877: 2874: 2870: 2865: 2860: 2856: 2845: 2834: 2831: 2826: 2822: 2816: 2813: 2810: 2806: 2802: 2797: 2794: 2791: 2787: 2781: 2777: 2773: 2770: 2765: 2762: 2759: 2755: 2751: 2746: 2742: 2738: 2733: 2730: 2727: 2722: 2719: 2716: 2712: 2705: 2702: 2698: 2693: 2688: 2684: 2668: 2665: 2664: 2663: 2659: 2645:The area of a 2642: 2639: 2638: 2637: 2626: 2620: 2617: 2614: 2610: 2605: 2602: 2599: 2593: 2590: 2587: 2583: 2578: 2575: 2572: 2569: 2566: 2560: 2557: 2554: 2550: 2545: 2542: 2537: 2531: 2527: 2523: 2517: 2512: 2509: 2504: 2501: 2496: 2490: 2486: 2482: 2476: 2473: 2450: 2447: 2428: 2427: 2414: 2411: 2406: 2403: 2400: 2395: 2392: 2387: 2384: 2381: 2378: 2375: 2370: 2366: 2362: 2357: 2353: 2350: 2344: 2341: 2338: 2333: 2330: 2325: 2320: 2316: 2312: 2309: 2272: 2271: 2260: 2257: 2254: 2251: 2248: 2242: 2239: 2233: 2230: 2196: 2193: 2158: 2155: 2152: 2149: 2144: 2140: 2114:Pick's theorem 2107: 2106: 2091: 2088: 2085: 2082: 2077: 2074: 2071: 2067: 2063: 2060: 2057: 2052: 2049: 2046: 2042: 2038: 2033: 2030: 2027: 2023: 2019: 2016: 2013: 2008: 2007: 2004: 2001: 1996: 1993: 1990: 1986: 1982: 1979: 1976: 1971: 1967: 1963: 1960: 1957: 1952: 1949: 1946: 1942: 1938: 1935: 1932: 1929: 1924: 1920: 1916: 1911: 1907: 1903: 1900: 1897: 1892: 1888: 1884: 1881: 1876: 1872: 1868: 1865: 1862: 1857: 1853: 1849: 1844: 1840: 1836: 1831: 1830: 1827: 1824: 1819: 1816: 1813: 1809: 1805: 1802: 1799: 1794: 1790: 1786: 1781: 1777: 1773: 1770: 1767: 1762: 1759: 1756: 1752: 1748: 1745: 1742: 1739: 1734: 1730: 1726: 1721: 1717: 1713: 1710: 1707: 1702: 1698: 1694: 1691: 1686: 1682: 1678: 1675: 1672: 1667: 1663: 1659: 1654: 1650: 1646: 1641: 1638: 1633: 1630: 1627: 1626: 1610: 1604: 1597: 1585: 1579: 1572: 1549:absolute value 1522: 1519: 1514: 1510: 1506: 1501: 1497: 1493: 1473: 1468: 1464: 1460: 1455: 1451: 1447: 1425: 1422: 1419: 1415: 1403: 1402: 1391: 1386: 1378: 1375: 1372: 1369: 1366: 1363: 1360: 1356: 1352: 1348: 1345: 1342: 1339: 1336: 1332: 1328: 1327: 1322: 1319: 1316: 1313: 1310: 1306: 1302: 1298: 1295: 1292: 1288: 1284: 1283: 1281: 1274: 1271: 1268: 1263: 1260: 1257: 1253: 1247: 1244: 1241: 1236: 1233: 1230: 1226: 1222: 1217: 1213: 1209: 1192: 1191: 1180: 1175: 1171: 1167: 1162: 1158: 1147: 1143: 1139: 1134: 1130: 1120: 1115: 1111: 1105: 1102: 1099: 1095: 1091: 1086: 1083: 1080: 1076: 1070: 1066: 1062: 1057: 1054: 1051: 1046: 1043: 1040: 1036: 1030: 1027: 1022: 1019: 1003:), the signed 990: 987: 980: 973: 965: 958: 942: 937: 934: 931: 927: 923: 918: 915: 912: 908: 904: 901: 898: 895: 892: 887: 883: 879: 874: 870: 866: 863: 860: 855: 851: 847: 842: 838: 834: 814: 811: 810: 809: 806:turning number 765:Exterior angle 761: 746: 742: 739: 736: 733: 730: 727: 724: 697: 693: 690: 687: 684: 681: 678: 675: 640: 637: 603: 600: 594: 591: 571: 567: 560: 557: 551: 548: 544: 518:-gon ( having 482:Interior angle 473: 470: 443: 440: 439: 438: 424: 416: 413: 401: 400: 397:symmetry orbit 389: 386:symmetry orbit 378: 368: 354: 348: 342: 334: 331: 330: 329: 323: 295: 289: 283: 277: 274: 263: 260: 255: 252: 242: 241:Classification 239: 210: 207: 168:polygonal area 148:simple polygon 26: 9: 6: 4: 3: 2: 7005: 6994: 6991: 6989: 6986: 6985: 6983: 6972: 6968: 6964: 6959: 6956: 6952: 6949: 6947: 6940: 6933: 6927: 6925: 6921: 6918: 6916: 6912: 6908: 6904: 6901: 6899: 6895: 6892: 6890: 6886: 6882: 6881: 6878: 6876: 6874: 6871: 6869: 6865: 6862: 6860: 6857: 6855: 6852: 6851: 6848: 6846: 6844: 6841: 6839: 6835: 6832: 6830: 6827: 6825: 6822: 6821: 6818: 6816: 6809: 6802: 6796: 6794: 6791: 6789: 6785: 6782: 6780: 6777: 6775: 6772: 6771: 6768: 6766: 6759: 6752: 6746: 6744: 6741: 6739: 6735: 6732: 6730: 6727: 6725: 6722: 6721: 6718: 6716: 6709: 6703: 6701: 6698: 6696: 6692: 6689: 6687: 6684: 6682: 6679: 6678: 6675: 6673: 6671: 6668: 6666: 6662: 6659: 6657: 6654: 6652: 6649: 6648: 6645: 6641: 6638: 6636: 6633: 6631: 6630:Demitesseract 6628: 6626: 6622: 6619: 6617: 6614: 6612: 6609: 6608: 6605: 6601: 6598: 6596: 6594: 6591: 6589: 6585: 6582: 6580: 6577: 6575: 6572: 6571: 6568: 6565: 6563: 6560: 6558: 6555: 6553: 6550: 6548: 6545: 6543: 6540: 6539: 6536: 6530: 6527: 6523: 6516: 6512: 6505: 6501: 6496: 6492: 6487: 6483: 6478: 6476: 6474: 6470: 6460: 6456: 6454: 6452: 6448: 6444: 6442: 6440: 6436: 6432: 6430: 6427: 6426: 6421: 6417: 6409: 6404: 6402: 6397: 6395: 6390: 6389: 6386: 6375: 6374:Weakly simple 6372: 6370: 6367: 6365: 6362: 6360: 6357: 6355: 6352: 6350: 6347: 6345: 6342: 6340: 6337: 6335: 6332: 6330: 6327: 6325: 6322: 6320: 6317: 6315: 6314:Infinite skew 6312: 6310: 6307: 6305: 6302: 6300: 6297: 6295: 6292: 6290: 6287: 6286: 6284: 6280: 6274: 6271: 6269: 6266: 6264: 6261: 6259: 6256: 6254: 6251: 6249: 6246: 6244: 6241: 6239: 6236: 6235: 6233: 6230: 6229:Star polygons 6226: 6216: 6215:Apeirogon (∞) 6213: 6211: 6208: 6206: 6203: 6201: 6198: 6196: 6193: 6191: 6188: 6186: 6183: 6181: 6178: 6176: 6173: 6172: 6170: 6166: 6160: 6159:Icosagon (20) 6157: 6155: 6152: 6150: 6147: 6145: 6142: 6140: 6137: 6135: 6132: 6130: 6127: 6125: 6122: 6120: 6117: 6116: 6114: 6110: 6104: 6101: 6099: 6096: 6094: 6091: 6089: 6086: 6084: 6081: 6079: 6076: 6074: 6071: 6069: 6066: 6064: 6061: 6059: 6056: 6055: 6053: 6049: 6046: 6040: 6034: 6031: 6029: 6026: 6024: 6021: 6019: 6016: 6014: 6011: 6009: 6006: 6004: 6001: 5999: 5996: 5994: 5993:Parallelogram 5991: 5989: 5988:Orthodiagonal 5986: 5984: 5981: 5979: 5976: 5974: 5971: 5969: 5968:Ex-tangential 5966: 5964: 5961: 5959: 5956: 5954: 5951: 5949: 5946: 5944: 5941: 5940: 5938: 5936: 5932: 5926: 5923: 5921: 5918: 5916: 5913: 5911: 5908: 5906: 5903: 5901: 5898: 5896: 5893: 5892: 5890: 5888: 5884: 5879: 5875: 5868: 5863: 5861: 5856: 5854: 5849: 5848: 5845: 5838: 5835: 5832: 5829: 5826: 5823: 5820: 5817: 5814: 5811: 5808: 5805: 5800: 5799: 5794: 5791: 5786: 5785: 5772: 5768: 5764: 5757: 5749: 5743: 5735: 5729: 5722: 5716: 5709: 5703: 5696: 5692: 5689: 5684: 5675: 5669: 5665: 5664: 5659: 5653: 5646: 5645:0-415-32505-6 5642: 5638: 5637: 5630: 5623: 5622:0-8232-1486-9 5619: 5615: 5614: 5607: 5600: 5599: 5592: 5585: 5584:0-19-875277-6 5581: 5577: 5576: 5569: 5562: 5561:1-84706-349-7 5558: 5554: 5553: 5546: 5539: 5538:0-415-15792-7 5535: 5531: 5530: 5523: 5516: 5515:0-582-28157-1 5512: 5508: 5507: 5500: 5493: 5492: 5485: 5478: 5477:0-201-34712-1 5474: 5470: 5469: 5462: 5455: 5454:0-471-27047-4 5451: 5447: 5446: 5439: 5431: 5425: 5420: 5419: 5410: 5404: 5400: 5394: 5388: 5384: 5378: 5369: 5364: 5360: 5356: 5352: 5345: 5329: 5325: 5319: 5317: 5310:(1976), p.298 5309: 5305: 5304: 5298: 5296: 5294: 5292: 5290: 5288: 5281: 5277: 5271: 5269: 5262: 5256: 5254: 5252: 5243: 5237: 5233: 5232: 5224: 5222: 5220: 5218: 5216: 5214: 5212: 5210: 5208: 5206: 5204: 5202: 5200: 5198: 5196: 5194: 5192: 5190: 5188: 5186: 5184: 5182: 5180: 5178: 5176: 5168: 5162: 5154: 5150: 5146: 5142: 5137: 5132: 5128: 5124: 5117: 5110: 5104: 5095: 5093: 5091: 5089: 5081: 5077: 5073: 5069: 5064: 5055: 5047: 5043: 5036: 5029: 5008: 5004: 5000: 4997: 4994: 4989: 4985: 4982: 4976: 4973: 4970: 4965: 4962: 4957: 4952: 4948: 4939: 4933: 4918: 4911: 4906: 4899: 4893: 4885: 4881: 4877: 4873: 4869: 4865: 4860: 4855: 4851: 4847: 4846: 4841: 4835: 4828: 4822: 4811: 4809: 4801: 4793: 4786: 4775: 4771: 4767: 4763: 4759: 4755: 4751: 4744: 4737: 4718: 4711: 4704: 4695: 4687: 4681: 4677: 4676: 4668: 4660: 4659: 4654: 4648: 4642: 4637: 4636: 4628: 4624: 4613: 4609: 4605: 4602: 4598: 4595: 4594: 4589: 4586: 4585: 4571: 4570:Tiling puzzle 4568: 4566: 4563: 4561: 4558: 4556: 4553: 4551: 4548: 4546: 4543: 4541: 4538: 4536: 4533: 4531: 4528: 4526: 4523: 4521: 4518: 4516: 4513: 4511: 4508: 4506: 4503: 4501: 4498: 4497: 4490: 4488: 4467: 4463: 4459: 4454: 4450: 4443: 4440: 4432: 4427: 4423: 4421: 4415: 4411: 4405: 4401: 4395: 4390: 4385: 4383: 4379: 4375: 4371: 4367: 4356: 4353: 4345: 4335: 4331: 4325: 4324: 4319:This section 4317: 4313: 4308: 4307: 4303: 4293: 4291: 4287: 4283: 4279: 4274: 4272: 4268: 4264: 4260: 4256: 4252: 4247: 4245: 4238: 4234: 4229: 4220: 4218: 4214: 4210: 4206: 4201: 4199: 4194: 4192: 4188: 4184: 4180: 4176: 4172: 4168: 4159: 4145: 4142: 4139: 4136: 4135: 4131: 4128: 4125: 4122: 4121: 4117: 4114: 4111: 4108: 4107: 4103: 4100: 4097: 4094: 4093: 4089: 4086: 4083: 4080: 4079: 4075: 4072: 4069: 4066: 4065: 4061: 4058: 4055: 4052: 4051: 4047: 4044: 4041: 4038: 4037: 4030: 4027: 4023: 4020:final suffix 4019: 4014: 4011: 4007: 4004: 4002: 3998: 3994: 3984: 3981: 3979: 3976: 3975: 3972:to a circle. 3971: 3966: 3963: 3961: 3958: 3957: 3954: 3951: 3948: 3946: 3943: 3942: 3939: 3938: 3933: 3930: 3928: 3925: 3924: 3920: 3916: 3915:Immanuel Kant 3912: 3908: 3905: 3903: 3900: 3899: 3896: 3893: 3890: 3888: 3885: 3884: 3881: 3878: 3875: 3874: 3871: 3868: 3865: 3864: 3861: 3858: 3855: 3854: 3851: 3848: 3845: 3844: 3841: 3838: 3835: 3834: 3831: 3828: 3825: 3824: 3821: 3818: 3815: 3814: 3811: 3808: 3806: 3803: 3802: 3798: 3795: 3792: 3791: 3788: 3785: 3782: 3781:icositetragon 3779: 3778: 3774: 3770: 3767: 3764: 3761: 3760: 3757: 3754: 3752: 3749: 3748: 3745: 3742: 3739: 3738: 3735: 3732: 3729: 3726: 3725: 3722: 3719: 3716: 3713: 3710: 3709: 3706: 3703: 3700: 3697: 3696: 3693: 3690: 3687: 3684: 3683: 3680: 3677: 3674: 3671: 3670: 3667: 3664: 3661: 3658: 3657: 3654: 3651: 3648: 3645: 3644: 3640: 3636: 3633: 3630: 3627: 3626: 3623: 3620: 3618: 3615: 3614: 3610: 3607: 3605:(or enneagon) 3604: 3601: 3600: 3597: 3594: 3592: 3589: 3588: 3584: 3580: 3576: 3575:constructible 3572: 3569: 3567:(or septagon) 3566: 3563: 3562: 3558: 3554: 3551: 3549: 3546: 3545: 3542:or pentacle. 3541: 3537: 3534: 3532: 3529: 3528: 3524: 3520: 3517: 3515:(or tetragon) 3514: 3513:quadrilateral 3511: 3510: 3506: 3502: 3499: 3496: 3493: 3492: 3488: 3484: 3481: 3479: 3476: 3475: 3471: 3468: 3466: 3463: 3462: 3458: 3455: 3452: 3451: 3448: 3443: 3441: 3437: 3434: 3431: 3426: 3423: 3421: 3417: 3416:quadrilateral 3413: 3409: 3408: 3403: 3402: 3397: 3393: 3389: 3385: 3381: 3377: 3373: 3370: 3366: 3353: 3349: 3345: 3341: 3337: 3334: 3330: 3326: 3322: 3319: 3315: 3311: 3310:complex plane 3307: 3306:configuration 3303: 3299: 3296: 3292: 3289: 3285: 3282: 3278: 3275: 3271: 3267: 3264: 3260: 3256: 3252: 3248: 3244: 3243: 3242: 3220: 3215: 3211: 3205: 3202: 3199: 3194: 3191: 3188: 3184: 3178: 3175: 3170: 3165: 3161: 3153: 3139: 3134: 3130: 3124: 3121: 3118: 3113: 3110: 3107: 3103: 3097: 3094: 3089: 3084: 3080: 3072: 3071: 3070: 3064: 3058: 3051: 3046: 3041: 3027: 3004: 2996: 2992: 2986: 2983: 2980: 2976: 2972: 2967: 2964: 2961: 2957: 2951: 2947: 2935: 2932: 2929: 2925: 2921: 2916: 2912: 2903: 2900: 2897: 2892: 2889: 2886: 2882: 2875: 2872: 2868: 2863: 2858: 2854: 2846: 2832: 2824: 2820: 2814: 2811: 2808: 2804: 2800: 2795: 2792: 2789: 2785: 2779: 2775: 2763: 2760: 2757: 2753: 2749: 2744: 2740: 2731: 2728: 2725: 2720: 2717: 2714: 2710: 2703: 2700: 2696: 2691: 2686: 2682: 2674: 2673: 2672: 2660: 2656: 2652: 2651: 2650: 2648: 2624: 2618: 2615: 2612: 2608: 2603: 2600: 2597: 2591: 2588: 2585: 2581: 2576: 2573: 2570: 2567: 2564: 2558: 2555: 2552: 2548: 2543: 2540: 2535: 2529: 2525: 2521: 2515: 2510: 2507: 2502: 2499: 2494: 2488: 2484: 2480: 2474: 2471: 2464: 2463: 2462: 2448: 2445: 2437: 2433: 2412: 2409: 2404: 2401: 2398: 2393: 2390: 2385: 2382: 2379: 2376: 2373: 2368: 2364: 2360: 2355: 2351: 2348: 2342: 2339: 2336: 2331: 2328: 2323: 2318: 2314: 2310: 2307: 2300: 2299: 2298: 2296: 2292: 2288: 2283: 2281: 2277: 2258: 2255: 2252: 2249: 2246: 2240: 2237: 2231: 2228: 2221: 2220: 2219: 2217: 2213: 2209: 2204: 2202: 2192: 2190: 2186: 2182: 2177: 2175: 2170: 2156: 2153: 2150: 2147: 2142: 2138: 2130: 2126: 2122: 2117: 2115: 2110: 2089: 2075: 2072: 2069: 2065: 2058: 2055: 2050: 2047: 2044: 2040: 2031: 2028: 2025: 2021: 2017: 2014: 2011: 1994: 1991: 1988: 1984: 1980: 1977: 1974: 1969: 1965: 1958: 1955: 1950: 1947: 1944: 1940: 1936: 1933: 1930: 1922: 1918: 1914: 1909: 1905: 1898: 1895: 1890: 1886: 1882: 1874: 1870: 1863: 1860: 1855: 1851: 1842: 1838: 1834: 1817: 1814: 1811: 1807: 1803: 1800: 1797: 1792: 1788: 1784: 1779: 1775: 1768: 1765: 1760: 1757: 1754: 1750: 1746: 1743: 1740: 1732: 1728: 1724: 1719: 1715: 1708: 1705: 1700: 1696: 1692: 1684: 1680: 1673: 1670: 1665: 1661: 1652: 1648: 1639: 1636: 1631: 1628: 1617: 1616: 1615: 1613: 1603: 1596: 1592: 1588: 1578: 1571: 1567: 1562: 1560: 1556: 1555: 1550: 1538: 1533: 1520: 1512: 1508: 1504: 1499: 1495: 1466: 1462: 1458: 1453: 1449: 1423: 1420: 1417: 1413: 1389: 1384: 1376: 1373: 1370: 1367: 1364: 1361: 1358: 1354: 1346: 1343: 1340: 1337: 1334: 1330: 1320: 1317: 1314: 1311: 1308: 1304: 1296: 1293: 1290: 1286: 1279: 1272: 1269: 1266: 1261: 1258: 1255: 1251: 1245: 1242: 1239: 1234: 1231: 1228: 1224: 1220: 1215: 1211: 1207: 1200: 1199: 1198: 1197: 1178: 1173: 1169: 1165: 1160: 1156: 1145: 1141: 1137: 1132: 1128: 1113: 1109: 1103: 1100: 1097: 1093: 1089: 1084: 1081: 1078: 1074: 1068: 1064: 1055: 1052: 1049: 1044: 1041: 1038: 1034: 1028: 1025: 1020: 1017: 1010: 1009: 1008: 1006: 1002: 996: 986: 979: 972: 968: 961: 935: 932: 929: 925: 921: 916: 913: 910: 906: 899: 896: 893: 885: 881: 877: 872: 868: 861: 853: 849: 845: 840: 836: 819: 807: 803: 799: 795: 791: 787: 783: 779: 775: 771: 767: 766: 762: 744: 737: 734: 731: 728: 722: 695: 688: 685: 682: 679: 673: 661: 657: 638: 635: 624: 620: 619:star polygons 601: 598: 592: 589: 569: 565: 558: 555: 549: 546: 542: 533: 527: 521: 517: 513: 508: 502: 498: 494: 488: 484: 483: 479: 478: 477: 469: 467: 458: 453: 448: 436: 433:: every line 432: 428: 425: 422: 419: 418: 415:Miscellaneous 412: 410: 409: 398: 394: 390: 387: 383: 379: 376: 372: 369: 366: 363:, called the 362: 358: 355: 352: 349: 346: 343: 340: 337: 336: 327: 324: 321: 317: 313: 312: 307: 303: 299: 296: 293: 290: 287: 284: 281: 278: 275: 272: 269: 268: 267: 259: 247: 238: 236: 232: 228: 224: 220: 216: 206: 204: 200: 195: 193: 189: 185: 181: 180:star polygons 176: 174: 170: 169: 164: 163: 158: 154: 153:solid polygon 149: 144: 142: 138: 134: 132: 127: 123: 122: 117: 113: 112: 106: 104: 100: 99:line segments 96: 93: 87: 54: 50: 41: 37: 33: 19: 6950: 6919: 6910: 6902: 6893: 6884: 6864:10-orthoplex 6600:Dodecahedron 6521: 6510: 6499: 6490: 6481: 6472: 6468: 6458: 6450: 6446: 6438: 6434: 6168:>20 sides 6103:Decagon (10) 6088:Heptagon (7) 6078:Pentagon (5) 6068:Triangle (3) 5963:Equidiagonal 5873: 5796: 5762: 5756: 5742: 5728: 5720: 5715: 5707: 5702: 5683: 5662: 5652: 5634: 5629: 5611: 5606: 5596: 5591: 5573: 5568: 5550: 5545: 5527: 5522: 5504: 5499: 5489: 5484: 5466: 5461: 5443: 5438: 5417: 5409: 5398: 5397:David Hume, 5393: 5382: 5377: 5358: 5354: 5344: 5332:. Retrieved 5328:Ask Dr. Math 5327: 5302: 5230: 5166: 5161: 5126: 5122: 5116: 5108: 5103: 5071: 5063: 5054: 5048:(18): 23–28. 5045: 5041: 5028: 4917: 4905: 4897: 4892: 4859:math/0408104 4849: 4843: 4834: 4826: 4821: 4807: 4800: 4791: 4785: 4774:the original 4753: 4749: 4736: 4724:. Retrieved 4717:the original 4703: 4694: 4674: 4667: 4657: 4647: 4634: 4627: 4607: 4600: 4591: 4582:Bibliography 4555:Spirolateral 4540:Polygon soup 4428: 4424: 4419: 4413: 4409: 4403: 4399: 4393: 4389:polygon mesh 4386: 4363: 4348: 4342:October 2018 4339: 4328:Please help 4323:verification 4320: 4275: 4265:, or at the 4248: 4241: 4202: 4195: 4183:Aristophanes 4175:star polygon 4164: 4012: 3990: 3935: 3805:triacontagon 3712:heptadecagon 3686:pentadecagon 3673:tetradecagon 3446: 3427: 3424: 3405: 3399: 3395: 3383: 3379: 3371: 3364: 3362: 3351: 3347: 3332: 3270:skew polygon 3240: 3056: 3049: 3042: 3019: 2670: 2654: 2644: 2435: 2431: 2429: 2290: 2286: 2284: 2279: 2273: 2215: 2207: 2205: 2198: 2188: 2184: 2180: 2178: 2171: 2124: 2120: 2118: 2111: 2108: 1608: 1601: 1594: 1583: 1576: 1569: 1565: 1563: 1558: 1552: 1534: 1404: 1196:determinants 1193: 998: 977: 970: 963: 956: 824: 797: 785: 781: 773: 763: 659: 655: 531: 525: 519: 515: 506: 492: 486: 480: 475: 464: 456: 451: 430: 408:star polygon 405: 402: 391:Isotoxal or 380:Isogonal or 365:circumcircle 326:Star polygon 309: 305: 301: 265: 257: 234: 230: 226: 222: 214: 212: 196: 192:skew polygon 177: 172: 167: 166: 161: 160: 156: 152: 145: 143:is a 3-gon. 136: 130: 129: 125: 119: 115: 109: 107: 52: 46: 36: 6873:10-demicube 6834:9-orthoplex 6784:8-orthoplex 6734:7-orthoplex 6691:6-orthoplex 6661:5-orthoplex 6616:Pentachoron 6604:Icosahedron 6579:Tetrahedron 6364:Star-shaped 6339:Rectilinear 6309:Equilateral 6304:Equiangular 6268:Hendecagram 6112:11–20 sides 6093:Octagon (8) 6083:Hexagon (6) 6058:Monogon (1) 5900:Equilateral 4185:, found at 3763:icositrigon 3728:octadecagon 3699:hexadecagon 3559:the plane. 3525:the plane. 3507:the plane. 3497:(or trigon) 3459:Properties 3378:πολύγωνον ( 3367:comes from 3333:realization 3320:dimensions. 3255:cartography 1537:orientation 1124:where  711:radians or 582:radians or 421:Rectilinear 345:Equilateral 339:Equiangular 322:dimensions. 292:Star-shaped 97:made up of 6982:Categories 6859:10-simplex 6843:9-demicube 6793:8-demicube 6743:7-demicube 6700:6-demicube 6670:5-demicube 6584:Octahedron 6369:Tangential 6273:Dodecagram 6051:1–10 sides 6042:By number 6023:Tangential 6003:Right kite 4577:References 4271:California 3919:David Hume 3660:tridecagon 3629:hendecagon 3369:Late Latin 3348:polyhedron 3340:polyhedron 1194:or, using 509:− 2) × 180 454:-gon into 435:orthogonal 371:Tangential 182:and other 6907:orthoplex 6829:9-simplex 6779:8-simplex 6729:7-simplex 6686:6-simplex 6656:5-simplex 6625:Tesseract 6349:Reinhardt 6258:Enneagram 6248:Heptagram 6238:Pentagram 6205:65537-gon 6063:Digon (2) 6033:Trapezoid 5998:Rectangle 5948:Bicentric 5910:Isosceles 5887:Triangles 5798:MathWorld 5793:"Polygon" 5361:: 33–59. 5098:Mathworld 5001:⋅ 4998:π 4986:π 4977:⁡ 4971:⋅ 4958:⋅ 4943:∞ 4937:→ 4840:Pak, Igor 4601:Polyhedra 4412:+ 1) / 2( 4382:materials 4370:primitive 4282:honeycomb 4223:In nature 4213:imaginary 4203:In 1952, 4171:pentagram 3978:apeirogon 3964:1,000,000 3945:65537-gon 3902:chiliagon 3647:dodecagon 3540:pentagram 3440:pentagram 3407:dodecagon 3390:-derived 3372:polygōnum 3363:The word 3344:polytopes 3318:imaginary 3281:apeirogon 3203:− 3185:∑ 3122:− 3104:∑ 3045:triangles 2973:− 2901:− 2883:∑ 2801:− 2729:− 2711:∑ 2616:− 2609:α 2604:⁡ 2598:⋅ 2589:− 2582:α 2577:⁡ 2571:⋅ 2556:− 2549:α 2544:⁡ 2508:π 2503:⁡ 2446:α 2410:π 2405:⁡ 2399:⋅ 2391:π 2386:⁡ 2380:⋅ 2374:⋅ 2352:π 2343:⁡ 2337:⋅ 2324:⋅ 2253:⋅ 2247:⋅ 2154:π 2123:and area 2073:− 2066:θ 2059:⁡ 2048:− 2029:− 2015:⋯ 1992:− 1985:θ 1978:⋯ 1966:θ 1959:⁡ 1948:− 1934:⋯ 1919:θ 1906:θ 1899:⁡ 1871:θ 1864:⁡ 1815:− 1808:θ 1801:⋯ 1789:θ 1776:θ 1769:⁡ 1758:− 1744:⋯ 1729:θ 1716:θ 1709:⁡ 1681:θ 1674:⁡ 1564:The area 1270:− 1252:∑ 1243:− 1225:∑ 1090:− 1053:− 1035:∑ 933:− 914:− 897:… 790:pentagram 732:− 683:− 674:π 593:− 570:π 550:− 461:triangles 213:The word 209:Etymology 18:Polygonal 6988:Polygons 6961:Topics: 6924:demicube 6889:polytope 6883:Uniform 6644:600-cell 6640:120-cell 6593:Demicube 6567:Pentagon 6547:Triangle 6324:Isotoxal 6319:Isogonal 6263:Decagram 6253:Octagram 6243:Hexagram 6044:of sides 5973:Harmonic 5874:Polygons 5691:Archived 5660:(1981). 4655:(1974). 4535:Polyform 4493:See also 4374:vertices 4290:hexagons 4284:made by 4244:crystals 4146:-ennea- 4118:-hepta- 4090:-penta- 4076:-tetra- 3927:myriagon 3751:icosagon 3565:heptagon 3531:pentagon 3495:triangle 3436:pentagon 3412:triangle 3401:pentagon 3352:polytope 3316:and two 3063:centroid 2667:Centroid 1589:and the 796:, where 760:degrees. 654:-gon (a 534:-gon is 489:-gon is 427:Monotone 406:regular 199:polytope 141:triangle 121:vertices 49:geometry 6898:simplex 6868:10-cube 6635:24-cell 6621:16-cell 6562:Hexagon 6416:regular 6344:Regular 6289:Concave 6282:Classes 6190:257-gon 6013:Rhombus 5953:Crossed 5403:p. 101. 5153:1343696 5145:2161556 5082:. p. 4. 4884:6756387 4876:2128993 4770:2686282 4525:Golygon 4278:biology 4153:History 4132:-octa- 4104:-hexa- 4031:-hena- 3960:megagon 3887:257-gon 3617:decagon 3603:nonagon 3591:octagon 3548:hexagon 3465:monogon 3430:regular 3420:nonagon 3398:, e.g. 3365:polygon 3312:of two 3261:of the 2658:figure. 2655:density 2293:of its 2276:apothem 2210:of its 2169:holds. 1607:, ..., 1582:, ..., 802:density 800:is the 512:degrees 501:radians 495:− 2) × 351:Regular 320:complex 316:Hilbert 302:complex 286:Concave 215:polygon 173:polygon 126:corners 90:) is a 53:polygon 6838:9-cube 6788:8-cube 6738:7-cube 6695:6-cube 6665:5-cube 6552:Square 6429:Family 6354:Simple 6299:Cyclic 6294:Convex 6018:Square 5958:Cyclic 5920:Obtuse 5915:Kepler 5670:  5643:  5620:  5582:  5559:  5536:  5513:  5475:  5452:  5426:  5387:p. 22. 5238:  5151:  5143:  5078:  4882:  4874:  4768:  4682:  4565:Tiling 4489:test. 4255:basalt 4179:krater 4062:-tri- 4025:-kai- 3993:Kepler 3949:65,537 3931:10,000 3773:neusis 3456:Sides 3410:. The 3359:Naming 3061:. The 3059:> 3 2127:, the 1405:where 1001:simple 472:Angles 361:circle 357:Cyclic 306:simple 280:Simple 271:Convex 95:figure 6557:p-gon 6329:Magic 5925:Right 5905:Ideal 5895:Acute 5334:3 May 5141:JSTOR 5038:(PDF) 4880:S2CID 4854:arXiv 4813:(PDF) 4777:(PDF) 4766:JSTOR 4746:(PDF) 4726:6 Feb 4720:(PDF) 4713:(PDF) 4619:Notes 4235:, in 4187:Caere 4048:-di- 4034:-gon 4017:Ones 4009:Tens 3577:with 3478:digon 3453:Name 3388:Greek 3376:Greek 3304:is a 3251:digon 969:) = ( 227:gōnía 223:polús 219:Greek 128:. An 116:sides 111:edges 92:plane 6915:cube 6588:Cube 6418:and 6359:Skew 5983:Kite 5878:List 5668:ISBN 5641:ISBN 5618:ISBN 5580:ISBN 5557:ISBN 5534:ISBN 5511:ISBN 5473:ISBN 5450:ISBN 5424:ISBN 5336:2015 5236:ISBN 5076:ISBN 5046:2015 4728:2013 4680:ISBN 4286:bees 4251:lava 4231:The 4209:real 3906:1000 3557:tile 3555:Can 3523:tile 3505:tile 3433:star 3418:and 3396:-gon 3350:and 3314:real 3043:For 2218:by 2148:> 1484:and 1005:area 813:Area 778:turn 528:− 2) 231:gónu 157:body 133:-gon 51:, a 6464:(p) 5767:doi 5363:doi 5306:by 5276:doi 5131:doi 5127:124 4974:sin 4930:lim 4864:doi 4758:doi 4612:pdf 4396:+ 1 4364:In 4332:by 4276:In 4269:in 4261:in 4181:by 4013:and 3891:257 3879:100 3323:An 3279:An 3052:= 3 2601:cos 2574:sin 2541:cot 2500:cot 2402:cos 2383:sin 2340:sin 2056:sin 1956:sin 1896:sin 1861:sin 1766:sin 1706:sin 1671:sin 1557:or 1007:is 804:or 723:180 599:360 590:180 503:or 459:− 2 235:gon 165:or 124:or 114:or 47:In 6984:: 6969:• 6965:• 6945:21 6941:• 6938:k1 6934:• 6931:k2 6909:• 6866:• 6836:• 6814:21 6810:• 6807:41 6803:• 6800:42 6786:• 6764:21 6760:• 6757:31 6753:• 6750:32 6736:• 6714:21 6710:• 6707:22 6693:• 6663:• 6642:• 6623:• 6602:• 6586:• 6518:/ 6507:/ 6497:/ 6488:/ 6466:/ 5795:. 5359:32 5357:. 5353:. 5326:. 5315:^ 5286:^ 5267:^ 5250:^ 5174:^ 5149:MR 5147:. 5139:. 5125:. 5087:^ 5074:, 5044:. 5040:. 4878:. 4872:MR 4870:. 4862:. 4850:34 4848:. 4764:. 4754:17 4752:. 4748:. 4590:; 4384:. 4273:. 4219:. 4193:. 4137:90 4123:80 4109:70 4095:60 4081:50 4067:40 4053:30 4039:20 4028:1 3917:, 3913:, 3869:90 3859:80 3849:70 3839:60 3829:50 3819:40 3809:30 3796:25 3786:24 3775:. 3768:23 3755:20 3743:19 3733:18 3717:17 3704:16 3691:15 3678:14 3665:13 3652:12 3634:11 3621:10 3585:. 3489:. 3442:. 3414:, 3404:, 3338:A 3300:A 3293:A 3286:A 3268:A 3245:A 2282:. 2203:. 2181:do 2125:A 1600:, 1593:, 1575:, 1561:. 1208:16 976:, 962:, 411:. 237:. 146:A 105:. 6953:- 6951:n 6943:k 6936:2 6929:1 6922:- 6920:n 6913:- 6911:n 6905:- 6903:n 6896:- 6894:n 6887:- 6885:n 6812:4 6805:2 6798:1 6762:3 6755:2 6748:1 6712:2 6705:1 6534:n 6532:H 6525:2 6522:G 6514:4 6511:F 6503:8 6500:E 6494:7 6491:E 6485:6 6482:E 6473:n 6469:D 6462:2 6459:I 6451:n 6447:B 6439:n 6435:A 6407:e 6400:t 6393:v 5880:) 5876:( 5866:e 5859:t 5852:v 5801:. 5773:. 5769:: 5750:. 5736:. 5676:. 5647:. 5624:. 5586:. 5563:. 5540:. 5517:. 5479:. 5456:. 5432:. 5371:. 5365:: 5338:. 5278:: 5244:. 5155:. 5133:: 5023:. 5009:2 5005:R 4995:= 4990:n 4983:2 4966:2 4963:n 4953:2 4949:R 4940:+ 4934:n 4886:. 4866:: 4856:: 4815:. 4760:: 4730:. 4688:. 4614:) 4473:) 4468:0 4464:y 4460:, 4455:0 4451:x 4447:( 4444:= 4441:P 4420:n 4416:) 4414:n 4410:n 4408:( 4404:n 4400:n 4394:n 4355:) 4349:( 4344:) 4340:( 4326:. 4143:9 4129:8 4115:7 4101:6 4087:5 4073:4 4059:3 4045:2 3982:∞ 3608:9 3595:8 3570:7 3552:6 3535:5 3518:4 3500:3 3482:2 3469:1 3265:. 3221:. 3216:i 3212:y 3206:1 3200:n 3195:0 3192:= 3189:i 3179:n 3176:1 3171:= 3166:y 3162:c 3140:, 3135:i 3131:x 3125:1 3119:n 3114:0 3111:= 3108:i 3098:n 3095:1 3090:= 3085:x 3081:c 3067:n 3057:n 3050:n 3047:( 3028:A 3005:. 3002:) 2997:i 2993:y 2987:1 2984:+ 2981:i 2977:x 2968:1 2965:+ 2962:i 2958:y 2952:i 2948:x 2944:( 2941:) 2936:1 2933:+ 2930:i 2926:y 2922:+ 2917:i 2913:y 2909:( 2904:1 2898:n 2893:0 2890:= 2887:i 2876:A 2873:6 2869:1 2864:= 2859:y 2855:C 2833:, 2830:) 2825:i 2821:y 2815:1 2812:+ 2809:i 2805:x 2796:1 2793:+ 2790:i 2786:y 2780:i 2776:x 2772:( 2769:) 2764:1 2761:+ 2758:i 2754:x 2750:+ 2745:i 2741:x 2737:( 2732:1 2726:n 2721:0 2718:= 2715:i 2704:A 2701:6 2697:1 2692:= 2687:x 2683:C 2625:. 2619:2 2613:n 2592:2 2586:n 2568:n 2565:= 2559:2 2553:n 2536:4 2530:2 2526:s 2522:n 2516:= 2511:n 2495:4 2489:2 2485:s 2481:n 2475:= 2472:A 2449:, 2436:s 2432:n 2413:n 2394:n 2377:n 2369:2 2365:R 2361:= 2356:n 2349:2 2332:2 2329:n 2319:2 2315:R 2311:= 2308:A 2291:R 2287:n 2280:a 2259:. 2256:r 2250:p 2241:2 2238:1 2232:= 2229:A 2216:p 2208:r 2189:n 2185:n 2157:A 2151:4 2143:2 2139:p 2121:p 2090:. 2087:) 2084:] 2081:) 2076:2 2070:n 2062:( 2051:1 2045:n 2041:a 2037:[ 2032:2 2026:n 2022:a 2018:+ 2012:+ 2003:] 2000:) 1995:2 1989:n 1981:+ 1975:+ 1970:2 1962:( 1951:1 1945:n 1941:a 1937:+ 1931:+ 1928:) 1923:3 1915:+ 1910:2 1902:( 1891:4 1887:a 1883:+ 1880:) 1875:2 1867:( 1856:3 1852:a 1848:[ 1843:2 1839:a 1835:+ 1826:] 1823:) 1818:2 1812:n 1804:+ 1798:+ 1793:2 1785:+ 1780:1 1772:( 1761:1 1755:n 1751:a 1747:+ 1741:+ 1738:) 1733:2 1725:+ 1720:1 1712:( 1701:3 1697:a 1693:+ 1690:) 1685:1 1677:( 1666:2 1662:a 1658:[ 1653:1 1649:a 1645:( 1640:2 1637:1 1632:= 1629:A 1611:n 1609:θ 1605:2 1602:θ 1598:1 1595:θ 1586:n 1584:a 1580:2 1577:a 1573:1 1570:a 1566:A 1545:y 1541:x 1521:. 1518:) 1513:j 1509:y 1505:, 1500:j 1496:x 1492:( 1472:) 1467:i 1463:y 1459:, 1454:i 1450:x 1446:( 1424:j 1421:, 1418:i 1414:Q 1390:, 1385:| 1377:1 1374:+ 1371:j 1368:, 1365:1 1362:+ 1359:i 1355:Q 1347:j 1344:, 1341:1 1338:+ 1335:i 1331:Q 1321:1 1318:+ 1315:j 1312:, 1309:i 1305:Q 1297:j 1294:, 1291:i 1287:Q 1280:| 1273:1 1267:n 1262:0 1259:= 1256:j 1246:1 1240:n 1235:0 1232:= 1229:i 1221:= 1216:2 1212:A 1179:, 1174:0 1170:y 1166:= 1161:n 1157:y 1146:0 1142:x 1138:= 1133:n 1129:x 1119:) 1114:i 1110:y 1104:1 1101:+ 1098:i 1094:x 1085:1 1082:+ 1079:i 1075:y 1069:i 1065:x 1061:( 1056:1 1050:n 1045:0 1042:= 1039:i 1029:2 1026:1 1021:= 1018:A 983:) 981:0 978:y 974:0 971:x 966:n 964:y 959:n 957:x 955:( 941:) 936:1 930:n 926:y 922:, 917:1 911:n 907:x 903:( 900:, 894:, 891:) 886:1 882:y 878:, 873:1 869:x 865:( 862:, 859:) 854:0 850:y 846:, 841:0 837:x 833:( 798:d 786:d 782:n 774:n 745:p 741:) 738:q 735:2 729:p 726:( 696:p 692:) 689:q 686:2 680:p 677:( 660:q 656:p 639:q 636:p 602:n 566:) 559:n 556:2 547:1 543:( 532:n 526:n 524:( 520:n 516:n 507:n 505:( 497:π 493:n 491:( 487:n 457:n 452:n 431:L 377:. 367:. 137:n 131:n 86:/ 83:n 80:ɒ 77:ɡ 74:ɪ 71:l 68:ɒ 65:p 62:ˈ 59:/ 55:( 34:. 20:)

Index

Polygonal
Polygon (disambiguation)

geometry
/ˈpɒlɪɡɒn/
plane
figure
line segments
closed polygonal chain
edges
vertices
triangle
simple polygon
star polygons
self-intersecting polygons
Euclidean space
skew polygon
polytope
generalizations of polygons
Greek

Convex
Simple
Concave
Star-shaped
Self-intersecting
complex polygon
Hilbert
complex
Star polygon

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