A rotation turns a figure about a fixed point, called the centre of rotation.

A rotation is specified by:

• the centre of rotation O
• the angle of rotation
• the direction of rotation (clockwise or anticlockwise).

In the first diagram below, the point A is rotated through 120^o clockwise about O. In the second diagram, it is rotated through 60^o anticlockwise about O.

A rotation is a transformation that moves each point to its rotation image.