The center of rotation is the point that a shape rotates about.

The image below shows a shape rotated about the center of rotation with Cartesian coordinates (3, 3)..

                                                                              

  Example  1

  Describe the rotation shown below.

Find the center of rotation.

In our example, the Cartesian coordinates of the center of rotation is (3 ,3)..

Using a protractor or otherwise, find the angle the shape has been rotated.

The angle is 120° clockwise