Key learning points

1. Tracing paper can be a helpful tool to perform a rotation.
2. The image and the object should be congruent.
3. Unless a full rotation occurs, the object and its image will not have the same orientation.
4. Clockwise is the direction the hands of a clock travel in.
5. To rotate, you need the centre, direction and angle of rotation.

Keywords

• Transformation - A transformation is a process that may change the size, orientation or position of a shape.

• Rotation - The rotation of an object is the turning of an object by a fixed amount and around a fixed point (called the centre of rotation), without the image being flipped or its size changing.

• Centre of rotation - The centre of rotation is the fixed point about which an object is rotated.

• Object - The object is the starting figure, before a transformation has been applied.

• Image - The image is the resulting figure, after a transformation has been applied.

Common misconception