What is a fundamental property of rotations in transformations?

Rotations in transformations are defined around a specific fixed point known as the center of rotation. This center serves as the pivot point for the entire figure during the rotation process. As the figure rotates around this point, each point of the figure travels along a circular path determined by its distance from the center. This property is essential for maintaining the orientation of the figure, as all points move the same angular distance around the center.

Each rotation preserves the shape and size of the figure being transformed, which means aspects such as area and complexity remain unchanged. Additionally, rotations are not limited to circular figures; they can be applied to any geometrical shape. Therefore, the requirement for a fixed point is a fundamental aspect of how rotational transformations function in geometric contexts.