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triangle

tri·an·gle

triangle

 
pronunciation:
traI aeng gl
features:
Word History, Word Explorer, Word Parts
part of speech: noun
definition 1: a geometric plane figure having three sides and three angles.
Do you know how to find the area of a triangle?
 
definition 2: any of various things that resemble such a figure, such as a draftsman's triangle, used in drawing angles, or a musical instrument consisting of a bent metal rod that is struck by another rod, or a three-sided piece of land.
I love to hear the triangle in the marching band.
derivation: triangled (adj.)
Word History
Triangle comes from triangulus, a Latin word that means "having three angles or corners."
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  instrument, shape