30:T51b,

Rotation

A transformation in which a plane figure turns around a fixed center point. In other words, one point on the plane, the center of rotation, is fixed and everything else on the plane rotates about that point by a given angle.

Two arrows showing rotation: pre-image (left-pointing arrow) rotated around a center point to form the image (up-right arrow).

See also

Pre-image, image

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