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::
'at right angles' also found in these entries (note: many are not synonyms or translations):
Four Corners
- T-junction
- abeam
- adze
- alligator wrench
- angled
- anticlinal
- athwart
- axis
- backlighting
- ball valve
- beam
- beam sea
- beam wind
- bevel
- bevel gear
- calliper rule
- channel iron
- column
- compass plant
- contrary
- contrate
- cover
- cramp
- crib
- crib-wall
- cross
- cross section
- crosscut
- crown wheel
- cut
- decussate
- drawknife
- drop girt
- edge wave
- electromagnetic radiation
- ell
- end line
- equatorial
- erect
- evolute
- face gear
- facing tool
- fillet
- filling
- flange
- flipper
- flux
- foot score
- foul line