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tri•an•gle



Pronunciation: (trī'ang"gul), [key]
n.
1. a closed plane figure having three sides and three angles.
2. a flat triangular piece, usually of plastic, with straight edges, used in connection with a T square for drawing perpendicular lines, geometric figures, etc.
3. any three-cornered or three-sided figure, object, or piece: a triangle of land.
4. a musical percussion instrument that consists of a steel triangle, open at one corner, that is struck with a steel rod.
5. a group of three; triad.
6. a situation involving three persons, esp. one in which two of them are in love with the third.
7. (cap.) Astron.the constellation Triangulum.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

Triandatriangle inequality
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