Meaning of TRIANGLE in English

TRIANGLE

n.

Pronunciation: ' tr ī - ˌ a ŋ -g ə l

Function: noun

Etymology: Middle English, from Anglo-French, from Latin triangulum, from neuter of triangulus triangular, from tri- + angulus angle

Date: 14th century

1 : a polygon having three sides ― compare SPHERICAL TRIANGLE

2 a : 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

triangle 1: 1 equilateral, 2 acute, 3 obtuse, 4 scalene, 5 isosceles, 6 right triangle

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.