Rotations

Question 1

What is a Rotation?

Answer 1

A transformation that turns a figure around a fixed point, called the center of rotation. A rotation is an isometry, so the image of a rotated figure is congruent to the preimage.

Question 2

What is the Center of Rotation?

Answer 2

A fixed point that a figure is transformed on.

Question 3

What are the rules for Rotations in the Coordinate Plane?

Answer 3

90 degree turn: P(x, y) -> P’(-y, x).

180 degree turn: P(x, y) -> P’(-x, -y).

Question 4

What is the rule to remember for Rotations?

Answer 4

Unless otherwise stated, all rotations are counterclockwise.

Question 5

What are the rules for Rotations in the Coordinate Plane?

Answer 5

For 90 degree turns: P(x, y) -> P’(-y, x).

For 180 degree turns: P(x, y) -> P’(-x, -y).