• With a geometrical rotation, 3 things must be specified:
  • Magnitude (i.e. size of angle);
  • Direction (i.e. clockwise or anticlockwise); and
  • Centre.

We need to be able to “do” rotations and to identify which rotation has been done. Finding the centre of rotation can sometimes be a little fiddly.

Examples

Exercise

Let’s complete exercise 15B from pages 247 to 248:

The answers are below: