This file was made to help understand rotation about the center of a unit circle according to the term used.
On the left hand side, the clockwise rotation is displayed with key values: 0° rightward, -90° downward, -180° leftward, -270° upward, and -360° rightward again, making a full turn.

On the right hand side, the counterclockwise rotation is displayed with key values: 0° rightward, +90° upward, +180° leftward, +270° downward, and +360° rightward again, making a full turn.
Own work
BloomyFractal