**1. In which direction is a rotation with a negative angle of rotation ?**

Negative rotations are

clockwise, positive rotations areanti-clockwisearound the centre of rotation.

**2. What is a half turn rotation?**

A half turn rotation is a rotation of 180

^{o.}

**3. How many points are invariant (do not move) under rotations?**

There is only one invariant point under a rotation. That is the centre of rotation.

**4. What happens if we rotate an object through an angle of 360 ^{o}?**

We get back to where we started from!