### Rotational Symmetry
Symmetry

### Students should be able to:

- identify and describe rotational symmetry in two-dimensional shapes
and designs.

### Introduction to Rotational Symmetry: The Letter H

The letter H has linear symmetry, but it has another kind of symmetry
as well. Notice the yellow star on the H below. It is in the top left
corner of the H. Push the button below the H and see where the star ends
up.

Use this mini-movie on your
SMARTBoard
### What did you notice?

The yellow star ended up on the bottom right of the H after it rotated.
Even though it was in a different place, the H still looked the same.
When a figure looks the same after it is rotated we say that it has
**rotational symmetry.** The key though is that the letter cannot
rotate a full turn. It must be less than a full turn.

**Does the letter W have rotational symmetry?**
The letter W does not have rotational symmetry because it does not
look the same after it has rotated.

### Check Your Understanding

Does the letter N have rotational symmetry? Make an educated guess and
then push the button to find out.

Use this mini-movie on your
SMARTBoard