Geometry · Transformations
Center of Rotation
HSG-CO.A.5
Definition
The fixed point about which a figure is rotated.
Examples
- A figure turning around a fixed point C uses C as its center of rotation.
- Every point of a rotated figure stays the same distance from the center of rotation.
Key rule
The center of rotation is the one point that does not move during a rotation.
Memory hook
The fixed pivot point a figure turns around.