Definition of triangle Triangle

/tɹajˈæˌŋgʌl/ - [trayanggul] - tri•an•gle

We found 24 definitions of triangle from 8 different sources.

What does triangle mean?

WordNet

Noun Plural: triangles
triangle - a three-sided polygon
		trigon, trilateral
		polygon, polygonal shape a closed plane figure bounded by straight sides
		acute-angled triangle, acute 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-angled triangle, obtuse triangle a triangle that contains an obtuse interior angle
		right-angled triangle, right triangle a triangle with one right angle
		scalene triangle a triangle with no two sides of equal length
triangle - a percussion instrument consisting of a metal bar bent in the shape of an open triangle
triangle - any of various triangular drafting instruments used to draw straight lines at specified angles
triangle - something approximating the shape of a triangle; "the coastline of Chile and Argentina and Brazil forms two legs of a triangle"
triangle - a small northern constellation near Perseus between Andromeda and Aries
		Triangulum, Triangle

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Wiktionary

triangle (Noun)
A polygon with three sides and three angles.
triangle (Noun)
A percussion instrument made by forming a metal rod into a triangular shape which is open at one angle. It is suspended from a string and hit with a metal bar to make a resonant sound.
triangle (Noun)
A triangular shaped piece of equipment used for gathering the balls into the formation required by the game being played.
triangle (Noun)
A love triangle .
triangle (Noun)
The structure of systems composed with three interrelated objects.

Webster DictionaryWebster's Unabridged Dictionary 📘

triangle (n.)
A figure bounded by three lines, and containing three angles.
triangle (n.)
An instrument of percussion, usually made of a rod of steel, bent into the form of a triangle, open at one angle, and sounded by being struck with a small metallic rod.
triangle (n.)
A draughtsman's square in the form of a right-angled triangle.
triangle (n.)
A kind of frame formed of three poles stuck in the ground and united at the top, to which soldiers were bound when undergoing corporal punishment, -- now disused.
triangle (n.)
A small constellation situated between Aries and Andromeda.
triangle (n.)
A small constellation near the South Pole, containing three bright stars.

OmegaWiki DictionaryOmegaWiki Dictionary Ω

triangle
A geometric figure that consists of three straight limiting lines (sides) and three corners that are the intersection points of two sides
triangle
An idiophone type of musical instrument in the percussion family.

Chambers DictionaryChamber's 20th Century Dictionary 📕

triangle
trī′ang-gl, n. (math.) a plane figure with three angles and three sides: a musical instrument of percussion, formed of a steel rod bent in triangle-form, open at one angle: a frame of three halberds stuck in the ground to which soldiers were formerly bound to be flogged (generally pl.).—adjs. Trī′angled, Triang′ūlar, having three angles.—n. Triangūlar′ity.—adv. Triang′ūlarly.—v.t. Triang′ūlāte, to survey by means of a series of triangles.—adv. Triang′ūlātely.—n. Triangūlā′tion, act of triangulating: the series of triangles so used.—adj. Triang′ūloid. [Fr.,—L. triangulum—tres, three, angulus, an angle.]

Sailor's Word-BookThe Sailor's Word-Book ⛵

triangle
A geometrical figure consisting of three sides and as many angles. Also, a machine formed by spars for lifting weights, water-casks, &c. Also, a stage hung round a mast, to scrape, paint, or grease it.

Wikipedia

A triangle is a shape. It has three straight sides and three points. The three angles of a triangle add to 180 degrees. It is the polygon with the least possible number of sides.

Types of triangles.

Triangles can be grouped according to how long their sides are

Triangles can also be grouped by their angles.

Uses.

Triangles are extremely useful, because the ratio of the length of sides to an angle is always the same. Measuring objects using triangles is called Trigonometry. Some people have spent their entire lives studying triangles for use in trigonometry.

Modern computers usually use triangles to make more complex graphic images or shapes.
disambiguation
In geometry, a triangle is the flat shape formed by joining three points (not in a straight line) with straight line segments. A triangle is a three sided polygon.

In music, a triangle is a musical instrument that is made from a metal tube. It is in the shape of a triangle. It is open at one corner, and when it is hit with a metal stick, it makes a sound.
instrument
The triangle is a musical instrument with three sides and curved corners. There is always one corner where the sides do not join. This makes it possible for the instrument to vibrate.

The player holds a small piece of string or leather from which the triangle is hanging, and he makes a sound by hitting the triangle with a metal beater. In orchestras, where the percussionist may be playing several percussion instruments, the triangle may hang from a stand so that the player can move quickly to another instrument.

Triangles come in different sizes. Smaller ones will sound higher than larger ones.

The triangle can always be heard clearly above the sound of the orchestra or band.