1. Rotation
On a coordinate grid

2. For a Rotation, you need An angle or fraction of a turn A direction
Eg 90° or a Quarter Turn
Eg 180° or a Half Turn
A direction
Clockwise
Anticlockwise
A Centre of Rotation
A point around which the Object rotates

3. y x A Rotation of 90° Anticlockwise about (0,0) 8 7 6 5 4 3 2 1 x x x 1 2 3 4 5 6 7 8
–7 –6 –5 –4 –3 –2 –1 -1 -2 -3 -4 -5 -6
A Rotation of 90° Anticlockwise about (0,0) x x x x x

4. y x 1 2 3 4 5 6 7 8
–7 –6 –5 –4 –3 –2 –1 -1 -2 -3 -4 -5 -6
A Rotation of 180° about (0,0) x x x x x x x x