the angle between two radii of a circle that cut off on the circumference an arc equal in length to one quarter of the circumference; an angle of 90° or π/2 radians - at right angles ⇒
perpendicular or perpendicularly
WordReference Random House Learner's Dictionary of American English © 2025
ˈright ˈan•gle, n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2025- Mathematicsthe angle formed by two perpendicular lines;
an angle of 90°.
right′ an′gle,
right′-an′gled, adj.
- Mathematicsthe 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 angle 1.
- Middle English 1350–1400
Collins Concise English Dictionary © HarperCollins Publishers::
'right angle' also found in these entries (note: many are not synonyms or translations):
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