Question

Which figures have rotation symmetry?

Answer 1

Here is the answer I took the test

Explanation:

Answer 2

Rotational symmetry is defined as the property a shape has when it looks the same after some rotation by partial turns.

Also, for a figure to have rotational symmetry the shape must look exactly the same during rotation, at least once, before it is rotated by
`360^(\circ)`.

In the figures given above, when figure 'B' is rotated by
`180^(\circ)`, we get the same image as the previous. So, figure 'B' has rotational symmetry.

Similarly, in the figure 'D' it can be observed that when it is rotated by
`90^(\circ)`, we get the same image. Therefore, figure 'D' too has a rotational symmetry.

Whereas, the figures 'A' and 'C' do not show any rotational symmetry. Therefore, only figure 'B' and 'D' have the rotational symmetry.