# triangle

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## tri·an·gle

(trī′ăng′gəl)*n.*

**1.**

**a.**The plane figure formed by connecting three points not in a straight line by straight line segments; a three-sided polygon.

**b.**Something shaped like such a figure: a triangle of land.

**2.**Any of various flat, three-sided drawing and drafting guides, used especially to draw straight lines at specific angles.

**3.**

*Music*A percussion instrument consisting of a piece of metal in the shape of a triangle open at one angle.

**4.**A relationship involving three people, especially a ménage à trois.

[Middle English, from Old French, from Latin triangulum, from neuter of triangulus,

*three-angled*: tri-,*tri-*+ angulus,*angle*.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

## triangle

(ˈtraɪˌæŋɡəl)*n*

**1.**(Mathematics)

*geometry*a three-sided polygon that can be classified by angle, as in an acute triangle, or by side, as in an equilateral triangle. Sum of interior angles: 180°; area: base × height

**2.**any object shaped like a triangle

**3.**any situation involving three parties or points of view. See also eternal triangle

**4.**(Instruments)

*music*a percussion instrument consisting of a sonorous metal bar bent into a triangular shape, beaten with a metal stick

**5.**a group of three

[C14: from Latin

*triangulum*(noun), from*triangulus*(adjective), from tri- +*angulus*corner]**ˈtriˌangled**

*adj*

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

## tri•an•gle

art at tribrach

(ˈtraɪˌæŋ gəl) *n.*

**1.**a closed plane figure having three sides and three angles.

**2.**a flat triangular piece with straight edges, used in connection with a T square for drawing perpendicular lines, geometric figures, etc.

**3.**any three-cornered or three-sided figure, object, or piece: a triangle of land.

**4.**a musical percussion instrument that consists of a steel triangle, open at one corner, that is struck with a steel rod.

**5.**a group of three; triad.

**6.**a situation involving three persons, esp. one in which two of them are in love with the third.

[1350–1400; Middle English < Latin

*triangulum,*n. use of neuter of*triangulus*three-cornered. See tri-, angle^{1}]**tri′an`gled,**

*adj.*

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

## tri·an·gle

(trī′ăng′gəl) A closed geometric figure consisting of three sides.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

## Triangle

a set of three.*Example*: long wavering triangle of waterfowl, 1895.

Dictionary of Collective Nouns and Group Terms. Copyright 2008 The Gale Group, Inc. All rights reserved.

ThesaurusAntonymsRelated WordsSynonyms

**Legend:**Switch to new thesaurus

Noun | 1. | triangle - a three-sided polygon polygon, polygonal shape - a closed plane figure bounded by straight sides acute triangle, acute-angled triangle - a triangle whose interior angles are all acute equiangular triangle, equilateral triangle - a three-sided regular polygon isosceles triangle - a triangle with two equal sides oblique triangle - a triangle that contains no right angle obtuse triangle, obtuse-angled triangle - a triangle that contains an obtuse interior angle right triangle, right-angled triangle - a triangle with one right angle scalene triangle - a triangle with no two sides of equal length |

2. | triangle - something approximating the shape of a triangle; "the coastline of Chile and Argentina and Brazil forms two legs of a triangle" | |

3. | Triangle - a small northern constellation near Perseus between Andromeda and Aries | |

4. | triangle - any of various triangular drafting instruments used to draw straight lines at specified anglesdrafting instrument - an instrument used by a draftsman in making drawings | |

5. | triangle - a percussion instrument consisting of a metal bar bent in the shape of an open trianglepercussion instrument, percussive instrument - a musical instrument in which the sound is produced by one object striking another |

Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

Translations

مُثَلَّث

**مُثَلَّث موسيقي****triangl**

**trojúhelník**

**trekant**

**triangel**

**triangulo**

**kolmio**

**triangeli**

**trokut**

**triangl**

**háromszög**

**triangulum**

**òríhorn**

**òríhyrningur**

**þríhorn**

**þríhyrningur**

**トライアングル**

**三角形**

**삼각형**

**트라이앵글**

**triangulum**

**trikampis**

**trijstūris**

**triangel**

**trikotnik**

**triangel**

**triangel**

**trehörning**

**trekant**

**กิ๋ง เครื่องดนตรีรูปสามเหลี่ยม**

**สามเหลี่ยม**

**hình tam giác**

**kẻng ba gốc**

Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

Collins English/French Electronic Resource. © HarperCollins Publishers 2005

## triangle

*n*→ Dreieck

*nt*; (= set square) → (Zeichen)dreieck

*nt*; (Mus) → Triangel

*m*; (

*fig*: = relationship) → Dreiecksbeziehung

*f*

Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

## triangle

(ˈtraiӕŋgl)*noun*

**1.**a two-dimensional figure with three sides and three angles.

**2.**a musical instrument consisting of a triangular metal bar that is struck with a small hammer.

**triˈangular**(-gju-)

*adjective*

in the shape of a triangle. a triangular road-sign; It is triangular in shape.

Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.

## triangle

→ مُثَلَّث triangl, trojúhelník trekant, triangel Dreieck, Triangel τρίγωνο triángulo kolmio, triangeli triangle triangl, trokut triangolo トライアングル, 三角形 삼각형, 트라이앵글 driehoek, triangel trekant, triangel trójkąt triângulo треугольник triangel กิ๋ง เครื่องดนตรีรูปสามเหลี่ยม, สามเหลี่ยม üçgen hình tam giác, kẻng ba gốc 三角, 三角铁Multilingual Translator © HarperCollins Publishers 2009

## tri·an·gle

*n.*triángulo.

English-Spanish Medical Dictionary © Farlex 2012

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