Meaning of TRIANGLE in English

TRIANGLE

transcription, транскрипция: [ ˈtrī-ˌaŋ-gəl ]

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's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.