**1. Which way is a rotation with a negative angle of rotation ?**

Negative rotations are

clockwise, positive rotations areanti-clockwise.

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

A quarter turn rotation is a rotation of 90

^{o}(anti-clockwise).

**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. Is a rotation an isometry?**

Yes. The size and shape of the image and the object remain the same under a rotation.

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

We get back to where we started from!