Final answer:
Angles of rotational symmetry are those at which an object appears unchanged when rotated around its center. Examples include 45°, 90°, and 120°, illustrating that the object's rotated image matches the original.
Step-by-step explanation:
Eight angle measures that can be angles of rotational symmetry are 45°, 90°, 120°, 180°, 60°, 72°, 360°, and 30°. The characteristic that all angles mentioned above are of rotational symmetry have in common is that when an object is rotated around its center at one of these angles, the object appears unchanged. This means that the rotated image is indistinguishable from the pre-rotated image.