From Longman Dictionary of Contemporary Englishright angleˈright ˌangle ●○○ noun [countable] 1 HMan angle of 90°, like the angles at the corners of a square2 → at right angles (to something) —right-angled adjective a right-angled bend
Examples from the Corpus
right angle• Continue folding at a right angle to the end of strip.• Window eaves and roof gutters curve in organic efficiency rather than follow a mechanical right angle.• Pluto's right angle to Mercury insists a bright new day is dawning. 