| 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°. |
right angle  (click for larger image in new window) n. An angle formed by the perpendicular intersection of two straight lines; an angle of 90°. |
An angle measuring ninety degrees, formed by the intersection of two perpendicular lines. (Compare acute angle and obtuse angle.)
right angle  (rīt) Pronunciation Key
An angle having a measure of 90°. |