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purposes. Various designs are named navigation (protractor) triangle, nautical navigational triangle, nautical set square, Portland (navigational) triangle or
Portland protractor triangle, Kent-type triangle, Inoue-type A/B nautical triangle or plotting triangle, course triangle, yachtsmen triangle,
199:
raster. Variants in larger sizes, with fixed or detachable handles, with or without bevelled edges (facets), and with or without ink nodules or embossed labels exist as well. Some variants have extra markings at angles of 7° and 42° (138° and 173°) in addition to the normal 45° and 90° markings to
191:). Relatively uncommon in English-speaking countries, this is sometimes called a "protractor triangle", a term, however, also used for other similar designs. The original design has a hypotenuse length of 15.8 cm and features a 2×7 cm symmetry scale in
427:
1964 Das klassische
Geodreieck wird entwickelt und als international registrierte und geschützte Marke eingetragen. Inzwischen millionenfach gefertigt und in vielen Ländern zum Standard-Zeichengerät in der Schule und Ausbildung avanciert
150:
In some
European countries a common form of set square combines a 90-45-45 triangle, a ruler and a protractor into a single tool made of stiff or slightly flexible transparent plastic. Being a mandatory tool used by pupils in
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182:
176:", meaning "geometry triangle") or similar. It was originally developed in 1964 by the German-Austrian manufacturer
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107:
Less commonly found is the adjustable set square. Here, the body of the object is cut in half and rejoined with a
293:
92:: one with 90-45-45 degree angles, the other with 30-60-90 degree angles. Combining the two forms by placing the
415:
384:
76:(or formerly of polished wood) with the centre removed. More commonly the set square bears the markings of a
111:
marked with angles. Adjustment to the marked angle will produce any desired angle up to a maximum of 180°.
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and higher in German-speaking and neighbouring countries, this specific design is named "
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together will also yield 15° and 75° angles. They are often purchased in packs with
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217:" ("TZ triangle") exist for (larger) technical drawings (TZ from German:
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499:(in Austrian German). Innsbruck, Austria: Target Group Publishing GmbH.
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123:
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380:"Mittelständler Aristo: Dieses Unternehmen hat das Geodreieck erfunden"
238:
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80. Historische
Winkelmeßgeräte in Projekten des Mathematikunterrichts
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72:
The simplest form of set square is a triangular piece of transparent
803:
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211:
instead of degrees. Several other somewhat similar designs named "
788:
440:
Bergmayr, Thomas (2019-09-11). "Das
Geodreieck kommt aus Tirol".
73:
245:
However, some widely used navigational protractors, such as the
414:(in German). GEOtec Zeichen- und Kunststofftechnik GmbH. 2013.
753:
378:
Willner, Johannes (2021-03-14). Written at Gießen, Germany.
108:
85:
77:
223:). The scale reaches from 10 to 10 cm, or even 11 to 11 cm.
833:
292:(in German). Vol. 45. pp. 42–58 . Archived from
28:
446:(in Austrian German). No. Journal 9291. p. 15.
237:, a number of other protractor triangle types exist for
527:(in German). Vol. 2: Eig bis Inn (2 ed.).
207:
per ISO 5456-3, others feature angle scales in
88:. These set squares come in two usual forms, both
226:
610:
283:(1999). "1. Das Geodreieck und seine Vorfahren".
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19:For the British business incubator network, see
16:Object used in engineering and technical drawing
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459:"Das Geodreieck – das Original aus Wörgl"
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389:(in German). Frankfurt am Main, Germany.
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439:
337:
279:
135:
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27:
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48:) is an object used in engineering and
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490:
345:(in German). Institut für Mathematik,
60:or other particular planar angle to a
584:
520:
521:Walz, Guido (2017) . "Geodreieck".
457:Praxmarer, Christoph (2019-09-09).
13:
14:
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189:Geotec Schul- und Bürowaren GmbH
187:(after several refirmations now
84:. The outer edges are typically
549:from the original on 2021-07-12
503:from the original on 2021-07-12
473:from the original on 2021-07-12
418:from the original on 2021-07-11
393:from the original on 2021-05-19
353:from the original on 2009-04-05
227:Navigation protractor triangles
178:Dennert & Pape Aristo-Werke
491:Hrdina, Jasmine (2021-04-04).
385:Frankfurter Allgemeine Zeitung
52:, with the aim of providing a
1:
493:"Firma Geotec plant Neustart"
266:
114:
654:Coordinate-measuring machine
7:
564:
10:
971:
412:"Unternehmen / Geschichte"
251:
18:
857:
619:
467:Österreichischer Rundfunk
242:and supporting triangle.
898:Machine and metalworking
67:
945:Technical drawing tools
908:Measuring and alignment
343:"Das Geometrie-Dreieck"
576:Technical drawing tool
524:Lexikon der Mathematik
465:(in Austrian German).
339:Vollrath, Hans-Joachim
281:Vollrath, Hans-Joachim
233:
219:
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172:
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147:
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133:
129:
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249:, are not triangles.
139:
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31:
873:Cutting and abrasive
709:Laser measuring tool
533:Springer Verlag GmbH
347:Universität Würzburg
220:Technisches Zeichnen
32:triangle, set square
614:and alignment tools
146:with extra markings
819:Thread pitch gauge
644:Combination square
170:" (short form of "
148:
140:Variant of larger
134:
80:and a half circle
34:
932:
931:
624:Architect's scale
529:Springer Spektrum
173:Geometrie-Dreieck
50:technical drawing
962:
704:Laser line level
669:Engineer's scale
664:Drafting machine
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542:978-3-66253503-5
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262:de:Kartenbesteck
258:de:Anlegedreieck
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46:American English
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769:Sliding T bevel
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247:Cras protractor
231:Similar to the
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90:right triangles
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955:Squares (tool)
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863:Types of tools
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849:Winding sticks
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839:Weighing scale
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689:Gunter's chain
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659:Diagonal scale
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461:. Wirtschaft.
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382:. Wirtschaft.
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320:|journal=
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254:de:Kursdreieck
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829:Vernier scale
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724:Measuring rod
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719:Marking gauge
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299:on 2017-11-07
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153:middle school
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39:
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26:
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809:Tape measure
794:Straightedge
784:Steel square
779:Spirit level
774:Speed square
758:
749:Radius gauge
714:Lesbian rule
684:French curve
674:Feeler gauge
629:Beam compass
571:Speed square
551:. Retrieved
523:
516:
505:. Retrieved
496:
486:
475:. Retrieved
463:tirol.orf.at
462:
452:
443:Der Standard
441:
435:
426:
420:. Retrieved
406:
395:. Retrieved
383:
355:. Retrieved
333:
301:. Retrieved
294:the original
285:
275:
244:
230:
188:
149:
106:
71:
54:straightedge
41:
37:
35:
25:
923:Woodworking
699:Laser level
679:Flat spline
181: [
162: [
98:protractors
94:hypotenuses
58:right angle
950:Hand tools
939:Categories
824:Try square
814:Theodolite
759:Set square
744:Protractor
734:Micrometer
729:Meterstick
639:Chalk line
553:2021-07-12
507:2021-07-12
477:2021-07-12
422:2015-08-28
397:2021-07-12
357:2021-07-11
328:(29 pages)
303:2017-11-07
267:References
252:See also:
239:navigation
234:Geodreieck
214:TZ-Dreieck
205:axonometry
193:millimeter
159:Geodreieck
143:TZ-Dreieck
130:Geodreieck
117:Geodreieck
82:protractor
38:set square
21:SETsquared
739:Plumb-bob
612:Measuring
497:top.tirol
322:ignored (
312:cite book
127:Original
102:compasses
878:Forestry
868:Cleaning
804:T-square
634:Calipers
565:See also
547:Archived
501:Archived
471:Archived
416:Archived
391:Archived
351:Archived
341:(2006).
202:dimetric
86:bevelled
62:baseline
42:triangle
903:Masonry
893:Kitchen
844:Wiggler
789:Stencil
764:Skirret
649:Compass
469:(ORF).
74:plastic
913:Mining
883:Garden
799:Square
539:
260:, and
197:degree
918:Power
754:Ruler
387:(FAZ)
297:(PDF)
290:(PDF)
200:ease
185:]
166:]
109:hinge
78:ruler
68:Types
56:at a
888:Hand
834:Vise
537:ISBN
324:help
209:gons
195:and
100:and
694:Jig
40:or
941::
545:.
535:.
531:/
495:.
425:.
366:^
349:.
316::
314:}}
310:{{
256:,
183:de
164:de
104:.
64:.
36:A
604:e
597:t
590:v
556:.
510:.
480:.
400:.
360:.
326:)
306:.
44:(
23:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
