Rotational Symmetry

Rotational symmetry refers to a shape or object that looks the same after being rotated around a central point by a certain angle less than 360 degrees. For example, a star or a square has rotational symmetry because if you rotate them by specific angles, they appear unchanged. The degree of rotation that maps the object onto itself defines its symmetry; for instance, a triangle with three-fold symmetry matches up with itself after a 120-degree turn. This concept helps in understanding patterns, design, and natural forms that maintain their appearance when turned around their center.