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 120o clockwise about O. In the second diagram, it is rotated through 60o anticlockwise about O.
A rotation is a transformation that moves each point to its rotation image.