# triangle

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triangle
top: right triangle
bottom: equilateral triangle

## 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.]

## 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]
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-, angle1]
triangle
The area (A) of a triangle can be calculated using the following formula: A = 1/2 bh.

## tri·an·gle

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

## Triangle

a set of three.
Example: long wavering triangle of waterfowl, 1895.
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 triangle - a three-sided polygon    polygon, polygonal shape - a closed plane figure bounded by straight sidesacute triangle, acute-angled triangle - a triangle whose interior angles are all acuteequiangular triangle, equilateral triangle - a three-sided regular polygonisosceles triangle - a triangle with two equal sidesoblique triangle - a triangle that contains no right angleobtuse triangle, obtuse-angled triangle - a triangle that contains an obtuse interior angleright triangle, right-angled triangle - a triangle with one right anglescalene triangle - a triangle with no two sides of equal lengthcuneus, wedge, wedge shape - any shape that is triangular in cross section 2 triangle - something approximating the shape of a triangle; "the coastline of Chile and Argentina and Brazil forms two legs of a triangle"shape, form - the spatial arrangement of something as distinct from its substance; "geometry is the mathematical science of shape" 3 Triangle - a small northern constellation near Perseus between Andromeda and AriesTriangulum 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
مُثَلَّثمُثَلَّث موسيقي
triangltrojúhelník
trekanttriangel
triangulo
kolmiotriangeli
trokuttriangl
háromszögtriangulum
òríhornòríhyrningurþríhornþríhyrningur
トライアングル三角形
삼각형트라이앵글
triangulum
trikampis
trijstūris
triangel
trikotniktriangel
triangeltrehörningtrekant
กิ๋ง เครื่องดนตรีรูปสามเหลี่ยมสามเหลี่ยม
üçgentriangelüç köşe
hình tam giáckẻng ba gốc

## triangle

[ˈtraɪæŋgl] N (also Mus) →
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

## triangle

[ˈtraɪæŋgəl] n
(MATHEMATICS)
(MUSIC)
Collins English/French Electronic Resource. © HarperCollins Publishers 2005

## triangle

nDreieck 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

## triangle

[ˈtraɪˌæŋgl] n (Math, Mus) → triangolo
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.
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

triangl, trojúhelník trekant, triangel kolmio, triangeli triangl, trokut トライアングル, 三角形 삼각형, 트라이앵글 triangel กิ๋ง เครื่องดนตรีรูปสามเหลี่ยม, สามเหลี่ยม hình tam giác, kẻng ba gốc
Multilingual Translator © HarperCollins Publishers 2009

## tri·an·gle

n. triángulo.
English-Spanish Medical Dictionary © Farlex 2012
References in classic literature ?
We found that an imaginary line, drawn from the end of the wharf to a windmill farther along the shore, cut precisely in half the line of the triangle along which the Italians must escape to reach the land.
It happened that the Lancashire Queen, the shore at Turner's Shipyard, and the Solano Wharf were the corners of a big equilateral triangle. From ship to shore, the side of the triangle along which the Italians had to escape, was a distance equal to that from the Solano Wharf to the shore, the side of the triangle along which we had to travel to get to the shore before the Italians.
The same thing would happen if you were to treat in the same way a Triangle, or Square, or any other figure cut out of pasteboard.
Black on thy back is thy triangle and symbol; and I know also what is in thy soul.
I had noticed that whenever I built a fire, Ajor outlined in the air before her with a forefinger an isosceles triangle, and that she did the same in the morning when she first viewed the sun.
As the geometrician, when he is asked whether a certain triangle is capable being inscribed in a certain circle
"It has been ready a long while," answered the marker, who had already set the balls in a triangle, and was knocking the red one about for his own diversion.
It was already dark on the third day after the scene described in the previous chapter when we camped in some huts at the foot of the "Three Witches," as the triangle of mountains is called to which Solomon's Great Road runs.
William rose, casting a tranquil glance over the enthusiastic crowd, and his keen eyes rested by turns on the three extremities of a triangle formed opposite to him by three persons of very different interests and feelings.
The city forms an immense triangle marked out upon a vast plain of white sand, its acute angle directed toward the north and piercing a corner of the desert.
The counterpane was of patchwork, full of odd little parti-colored squares and triangles; and this arm of his tattooed all over with an interminable Cretan labyrinth of a figure, no two parts of which were of one precise shade --owing I suppose to his keeping his arm at sea unmethodically in sun and shade, his shirt sleeves irregularly rolled up at various times --this same arm of his, I say, looked for all the world like a strip of that same patchwork quilt.
Among others, to show the whimsicality of their deadly seriousness, may be mentioned the following: The Bleeding Hearts, Sons of the Morning, the Morning Stars, The Flamingoes, The Triple Triangles, The Three Bars, The Rubonics, The Vindicators, The Comanches, and the Erebusites.

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