What is an angle of rotation that maps the right square pyramid onto itself?

A square has rotational symmetry every 90 degrees: rotating it by 90 degrees maps each vertex to the next one. A right square pyramid has the same symmetry around the axis through its apex and the center of its square base, so a 90-degree rotation maps the pyramid onto itself. The correct choice is 90 degrees.

AI-written and checked against the verified answer.