A rectangle can be rotated about its centre by half a turn. The result looks exactly like the original rectangle. This is called **rotational symmetry**.

We say that the star **has rotational symmetry of order** .

If a shape only fits into itself once, it has no rotational symmetry. We also state that it has rotational symmetry of order 1.

- Question
What is the order of rotational symmetry for each of the following shapes?