4.3 Rotations

Front

What is another word for rotation?

Back

Turn

Front

Which rule describes rotating 270° counterclockwise?

Back

( x, y ) → ( y, -x )

Front

Rotate K (7, 8) around the origin 90° counterclockwise. State the image of K'.

Back

K' (-8, 7)

Front

Which rule describes rotating 90° counterclockwise?

Back

( x, y ) → ( -y, x )

Front

If you were to rotate ABCD 180° about the origin, what would the coordinate of A' be?

Back

(-3, -5)

Front

Define rotation in geometry.

Back

A transformation that turns a figure around a fixed point at a certain angle.

Front

What is the fixed point called in a rotation?

Back

Center of rotation.

Front

What is the angle of rotation?

Back

The degree measure of the turn in a rotation.

Front

How do you rotate a point (x, y) 180° about the origin?

Back

(x, y) → (-x, -y)

Front

What is the result of rotating a point 360°?

Back

The point remains in the same position.