: a percussion instrument consisting of a rod of steel bent into the form of a triangle open at one angle and sounded by striking with a small metal rod
b
: a drafting instrument consisting of a thin flat right-angled triangle of wood or plastic with acute angles of 45 degrees or of 30 degrees and 60 degrees
3
: a situation in which one member of a couple is involved in a love affair with a third person
Illustration of triangle
1 equilateral
2 acute
3 obtuse
4 scalene
5 isosceles
6 right triangle
Examples of triangle in a Sentence
She cut the sandwiches into triangles.
Recent Examples on the WebThis small-town drama does high school clichés like no other: a catastrophic love triangle, a good-girl-meets-bad-boy affair and cruel parents masked by a veneer of wealth.—Erica Marrison, Peoplemag, 9 June 2024 Fold the leaves tightly to cover the rice, then fold the protruding leaves over to the top triangle side to form a pyramid.—Michelle Tchea, Smithsonian Magazine, 4 June 2024 Kansas men’s basketball will play all three teams from the North Carolina triangle this upcoming season and again in 2025-26.—Gary Bedore, Kansas City Star, 24 May 2024 The first season featured the love triangle between Belly, Conrad, and Jeremiah and also shared a backstory of Susannah’s secret struggle with cancer.—Althea Legaspi, Rolling Stone, 14 May 2024 See all Example Sentences for triangle
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'triangle.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
Etymology
Middle English, from Anglo-French, from Latin triangulum, from neuter of triangulus triangular, from tri- + angulus angle
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