rotations

Front

What is the algebraic representation for a 90° counterclockwise rotation?

Back

(x, y) ----> (-y, x)

Front

What do we call the figure BEFORE the rotation?

Back

Pre-image

Front

Which rule describes rotating 90° clockwise?

Back

(x, y) → (y, -x)

Front

How many degrees was the figure rotated if it was rotated 90° clockwise?

Back

90 degrees clockwise

Front

Does a rotation preserve congruence?

Back

False

Front

What is the definition of rotation in geometry?

Back

A rotation is a circular movement of a figure around a fixed point.

Front

What is the fixed point called in a rotation?

Back

Center of rotation

Front

If a point (3, 4) is rotated 90° counterclockwise, what are the new coordinates?

Back

(-4, 3)

Front

What is the effect of a 180° rotation on a point (x, y)?

Back

(x, y) → (-x, -y)

Front

What is the difference between a rotation and a translation?

Back

A rotation turns a figure around a point, while a translation slides it to a new position.