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.