Angularity is a 3D control; the tolerance zone is two parallel planes. Angularity tolerance applied to a plane surface also controls the flatness on the surface.

Parallelism is the condition of a surface, axis, or center plane, oriented at 0˚/180˚ to the datum reference frame.

Perpendicularity is the condition of a surface, median plane, or axis oriented at 90˚ to the datum reference frame.