Triangle

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Dictionary Meaning and Definition on 'Triangle'

Triangle Meaning and Definition from WordNet (r) 2.0
    triangle n
  1. a three-sided polygon [syn: trigon, trilateral]
  2. something approximating the shape of a triangle; "the coastline of Chile and Argentina and Brazil forms two legs of a triangle"
  3. any of various triangular drafting instruments used to draw straight lines at specified angles
  4. a percussion instrument consisting of a metal bar bent in the shape of an open triangle
Triangle Meaning and Definition from Webster's Revised Unabridged Dictionary (1913)
    Triangle \Tri"an`gle\, n. [L. triangulum, fr. triangulus triangular; tri- (see Tri-) + angulus angle: cf. F. triangle. See Angle a corner.]
  1. (Geom.) A figure bounded by three lines, and containing three angles. Note: A triangle is either plane, spherical, or curvilinear, according as its sides are straight lines, or arcs of great circles of a sphere, or any curved lines whatever. A plane triangle is designated as scalene, isosceles, or equilateral, according as it has no two sides equal, two sides equal, or all sides equal; and also as right-angled, or oblique-angled, according as it has one right angle, or none; and oblique-angled triangle is either acute-angled, or obtuse-angled, according as all the angles are acute, or one of them obtuse. The terms scalene, isosceles, equilateral, right-angled, acute-angled, and obtuse-angled, are applied to spherical triangles in the same sense as to plane triangles.
  2. (Mus.) 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.
  3. A draughtsman's square in the form of a right-angled triangle.
  4. (Mus.) 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.
  5. (Astron.) (a) A small constellation situated between Aries and Andromeda. (b) A small constellation near the South Pole, containing three bright stars. Triangle spider (Zo["o]l.), a small American spider (Hyptiotes Americanus) of the family Ciniflonid[ae], living among the dead branches of evergreen trees. It constructs a triangular web, or net, usually composed of four radii crossed by a double elastic fiber. The spider holds the thread at the apex of the web and stretches it tight, but lets go and springs the net when an insect comes in contact with it.
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Wikipedia Meaning and Definition on 'Triangle'


A triangle is one of the basic shapes of geometry: a polygon with three corners or vertices and three sides or edges which are line segments. A triangle with vertices A, B, and C is denoted ABC.

In Euclidean geometry any three non-collinear points determine a unique triangle and a unique plane (i.e. a two-dimensional Euclidean space).

Triangles can be classified according to the relative lengths of their sides:

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Triangle Sample Sentences in News


  • ChannelAdvisor Recognized As a Best Place to Work by Triangle Business Journal for Fourth Consecutive Year
    ChannelAdvisor Corporation , a leading provider of cloud-based e-commerce solutions that enable retailers and manufacturers to increase global sales, today announced that it has been recognized as one of Triangle Business Journal’s 2014 Best Places to Work. Read more on this news related to 'Triangle'
  • Triangle Petroleum Unit Upsizes Senior Notes on High Demand
    Triangle USA Petroleum Corporation, an exploration and production (E&P) subsidiary of Triangle Petroleum Corporation (TPLM) has declared the pricing of its $450 million senior notes. Read more on this news related to 'Triangle'
  • Triangle Capital Corporation Announces Conference Call to Discuss Second Quarter 2014 Results
    RALEIGH, N.C. -- Triangle Capital Corporation ("Triangle" or the "Company"), a leading provider of capital to lower middle market companies, today announced it has scheduled a conference ... Read more on this news related to 'Triangle'

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