Topic 3: Point and Rotational Symmetry Answers 1. 120, 240 2. 180 3. 72 because a pentagon's interior angles measure 108 degrees, and the exterior angle measures 72 degrees. The exterior angles of regular polygons will be the degree of rotation. 72, 144, 216 degrees. 4. 72 because it has five petals, and rotates just like a pentagon! 5. Line segment, rectangle, rhombus, and square