8.10C Transformations-Rotations

Front

What is a rotation in geometry?

Back

A rotation is a transformation that turns a figure around a fixed point, called the center of rotation, by a certain angle in a specific direction.

Front

What is the center of rotation?

Back

The center of rotation is the fixed point around which a figure is rotated.

Front

What is the angle of rotation?

Back

The angle of rotation is the measure of the degree to which a figure is rotated around the center of rotation.

Front

What is the rule for rotating a point (x, y) 90° counterclockwise about the origin?

Back

(x, y) → (-y, x)