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triangle

[trahy-ang-guh

Example Sentences Origin

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noun

a closed plane figure having three sides and three angles.

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

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

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

a group of three; triad.

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

(initial capital letter

) Astronomy. the constellation Triangulum.

COLLAPSE

Origin:
1350–1400; Middle English < Latin triangulum, noun use of neuter of triangulus three-cornered. See tri-, angle¹

Related forms

tri·an·gled, adjective

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To triangle

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Triangle is always a great word to know.

So is altitude. Does it mean:

either of the two times a year when the sun is at its greatest distance from the celestial equator that takes place about June 21 and about December 22

the angular distance of a heavenly body above the horizon

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Example Sentences

Each is organized as a clear hierarchy rather than as a balanced triangle.

Between these two lines lies a large, fish-rich triangle.

Press down to create a pouch in the end of the plastic triangle.

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Each is organized as a clear hierarchy rather than as a balanced triangle.

Between these two lines lies a large, fish-rich triangle.

Press down to create a pouch in the end of the plastic triangle.

The hypotenuse of a right triangle is not always the shortest distance between the two points that define it.

He or she will realize there's something to each of these sounds that's special, and it has to do with that triangle with legs.

Arrange the woody pieces in a triangle one stem to the right one to the left and one across then tuck in flowers.

Everyone probably already knows about the density triangle.

His question coincided with my attempt to break the neatly formed triangle.

Its the same formula as solving a triangle in geometry, but it would not yield the faster than c speed recorded for the neutrinos.

He raised his arms, forming two sides of a triangle.

Cut out two triangles for the ears and one triangle for the beak, then attach with glue.

Being an eccentric geek, he is having the island shape changed from a rough triangle to a perfect equilateral triangle.

McKay's impossible triangle can be found at http://im-possibleinfo/english/articles/real/real3html.

Cut out triangle shapes with a saber saw or handsaw.

Instead of using three circles, the red light is now a triangle and the green light is a square.

The sharp black triangle jutting out of the central black circle is an artifact of the image processing.

See, this triangle has the same value for cosine of ?.

Actually, not knowing the angles of an isoceles right triangle would be enough for me to put the kabosh on someone's application.

Imagine your speakers as two corners of an equilateral triangle and you as the third.

Have them fold the paper in half diagonally to form a triangle and then fold it in half again to form a smaller triangle.

For a mitered edge, use scissors to cut a triangle out.

She needs some rhinoceros triangle to go with her blue ink.

Firefighters fight wildfires by depriving them of one or more of the fire triangle fundamentals.

The triangle and square bases can be connected with any of five different edge connectors.

It appears as a number surrounded by three arrows forming a triangle and indicates the type of plastic the container is made of.

Cut at an angle from each corner on the edge to the marked center point, which removes a triangle from the side of the cup.

Unfortunately, neither the right-pointing triangle nor the double pause bars seem to have a definitive origin.

The sitting lion's basic shape is a triangle formation of stars that forms the beast's rump.

And then a triangle of cloud lowers and sharpens into something pointier and leaner.

When opened, you unfold the sleeve to make a flat base with a triangle of corrugated cardboard above.

In one corner, mourning women swung in hammocks arranged in a tight triangle around a smoldering fire.

So, that is the area of the small triangle in terms of the value of y.

White wisps of cloud ride over the water, first revealing then hiding the black triangle mountains.

The triangle represents separation from the rocket and the square is the touchdown point.

First he made a triangle, then several loops attached to the triangle.

COLLAPSE

Collins

World English Dictionary

triangle (ˈtraɪˌæŋɡ^əl)

—n
1.	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: ½ base × height
2.	any object shaped like a triangle
3.	See also eternal triangle any situation involving three parties or points of view
4.	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]

'triangled

—*adj*

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline

Word Origin & History

triangle

late 14c., from O.Fr. triangle (13c.), from L. triangulum "triangle," from neut. of adj. triangulus "three-cornered," from tri- "three" + angulus "corner, angle." Triangulation is recorded from 1818.

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