Rotational Symmetry

This is a pentagon, the rotational symmetry is 5.

This is a square, it has rotational symmetry of 4.

This is a rectangle, it has rotational symmetry 2.

This is an octagon, it has rotational symmetry of 8.

This is an octagon, it has rotational symmetry of 8.

This is a triangle, it has roatational symmetry of 3.