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Meaning of right angle

right' an'gle

Pronunciation: [key]
  1. the angle formed by two radii of a circle that are drawn to the extremities of an arc equal to one quarter of the circle; the angle formed by two perpendicular lines that intersect; an angle of 90°. See diag. under.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.