Topic: SHAPES, PATTERNS
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| Date: | 1300-1400 |
| Language: | Latin |
| Origin: | triangulum, from tri- ( TRI-) + angulus 'angle' |
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tri‧an‧gle
[countable]
[countable]1HM a flat shape with three straight sides and three angles
2CF something that is shaped like a triangle : 
a triangle of land
a triangle of land3APM a musical instrument made of metal bent into the shape of a triangle. You hit it with a metal stick to make a ringing sound.
4 American EnglishHM a flat plastic object with three sides that has one angle of 90° and is used for drawing angles [= set-square British English]
