(also right-angle)Word forms: plural right angles
1N-COUNT 直角 A right angle is an angle of ninety degrees. A square has four right angles. 直角
2PHRASE (与…)成直角;(与…)垂直 If two things are at right angles, they are situated so that they form an angle of 90˚ where they touch each other. You can also say that one thing is at right angles to another. (与…)成直角;(与…)垂直