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since 1880
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How to Pronounce Triangle

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Meaning and Origin

What does the name Triangle mean? Find out below.

Origin and Meaning of Triangle

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Webster's Unabridged Dictionary
noun Tri"an`gle
  1. [Geom] A figure bounded by three lines, and containing three angles.
  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]
    1. A small constellation situated between Aries and Andromeda.
    2. A small constellation near the South Pole, containing three bright stars.

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.

Etymology: L. triangulum, fr. triangulus triangular; tri-see Tri-) + angulus angle: cf. F. triangle. See Angle a corner

Other Dictionary Sources
  1. A percussion instrument consisting of a metal bar bent in the shape of an open triangle
  2. Any of various triangular drafting instruments used to draw straight lines at specified angles
  3. A small northern constellation near Perseus between Andromeda and Aries
  4. A three-sided polygon
  5. Something approximating the shape of a triangle ("the coastline of Chile and Argentina and Brazil forms two legs of a triangle")

From Old French triangle, from Latin triangulum, noun use of adjective triangulus (“three-cornered, having three angles”), from trēs (“three”) + angulus (“corner, angle”).

  1. (geometry) A polygon with three sides and three angles.
  2. (US, Canada) A set square.
  3. (music) 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.
  4. (cue sports) A triangular piece of equipment used for gathering the balls into the formation required by the game being played.
  5. A love triangle.
  6. (systemics) The structure of systems composed with three interrelated objects.
  7. A draughtsman's square in the form of a right-angled triangle.
  8. (historical) A frame formed of three poles stuck in the ground and united at the top, to which soldiers were bound when undergoing corporal punishment.

triangle was also found in the following language(s): Catalan and French

Fun Facts about the name Triangle

  • How unique is the name Triangle? Out of 5,933,561 records in the U.S. Social Security Administration public data, the first name Triangle was not present. It is possible the name you are searching has less than five occurrences per year.
  • Weird things about the name Triangle: Your name in reverse order is Elgnairt. A random rearrangement of the letters in your name (anagram) will give Egtiarnl. How do you pronounce that?

What Triangles Have Visited This Page?

Past life for Triangle born Aug 31, 1974

I do not know how you feel about it, but you were a male in your last earthly incarnation. You were born somewhere around the territory of Alaska approximately on 750. Your profession was handicraftsman and mechanic.

You were a seeker of truth and wisdom. You could have seen your future lives. Others perceived you as an idealist illuminating path to the future. You fulfill your lesson by helping old folks and children. You came to that life to learn to care about weak and helpless.

Name poster for Triangle

Name poster for Triangle(click to save the high quality version)

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  • Sources:
  • U.S. Census Bureau: Frequently Occurring Surnames from the Census 2000 (public domain).
  • 1913 Webster's Revised Unabridged Dictionary via the Collaborative International Dictionary of English (License)
  • Other Dictionary Sources: WordNet 3.1 Copyright 2006 by Princeton University (License).
  • Wiktionary: Titles and License.