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Rotational Symmetry Symmetry
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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.
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.
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.
More Symmetry
Teach Symmetry with the
Symmetry Tool Virtual Manipulative
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