Video: Determining Whether a given Shape Has Rotational Symmetry or Not

Does this shape have rotational symmetry?

01:09

Video Transcript

Does this shape have rotational symmetry?

Objects that have rotational symmetry are rotated or turned around a centre point. And they appear the same after they have been rotated. Let’s try this out. Let’s rotate this square 45 degrees to the right.

Rotated 45 degrees, the square does not appear the same as when we started. What if we rotate it another 45 degrees? That would give us a 90-degree rotation from the original. A 90-degree rotation gives us the same shape we started with. Because we can rotate this square around a centre point, it has a rotational symmetry. Does this shape have rotational symmetry? Yes.

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