G.CO.3 Rotational Symmetry

If the polygon is mapped to itself after a rotation of between 0 and 360 degrees, the shape has rotational symmetry. Which of these shapes have rotational symmetry? Which do not? For the shapes that have rotational symmetry, for what angle measure(s) does the figure map to itself?

For the triangle, describe the rotations that carry the figure onto itself.

For the rectangle, describe the rotations that carry the figure onto itself.

For the pentagon, describe the rotations that carry the figure onto itself.