Question

what is the smallest angle of rotational symmetry for a square? 45° 90° 180° 360°

Explanation:

Step1: Recall rotational symmetry concept

A square can be rotated about its center.

Step2: Determine the angles of rotation

A square looks the same after rotating by 90°, 180°, 270°, 360°. The smallest non - zero angle among these is 90°.

Answer:

90°