right angle
nounUK /ˌraɪt ˈæŋɡəl/
US /ˌraɪt ˈæŋɡəl/
A right angle is a square corner that looks like the corner of a book.
The corner of the door makes a right angle.
RELATED WORDS
OTHER MEANINGS
2. A turn of exactly ninety degrees.
Turn the robot a right angle to the left.
3. A position where two lines meet straight up and down like an L.
The two walls meet at a right angle.
4. A standard used in building and drawing to check square corners.
The carpenter used a right angle to check the shelf.