## plane angle

an angle made by two straight lines that lie in the same plane

## plane angle

noun

An angle formed by two straight lines in the same plane.

## plane angle

Noun

(*plural* plane angles)

- (geometry) An angle formed by two intersecting straight lines.
- (geometry) An angle formed by two intersecting planes, measured by the angle between two intersecting straight lines that are in respective planes and perpendicular to the intersection of the planes.