Rotations Flashcards

1
Q

What is a Rotation?

A

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.

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2
Q

What is the Center of Rotation?

A

A fixed point that a figure is transformed on.

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3
Q

What are the rules for Rotations in the Coordinate Plane?

A

90 degree turn: P(x, y) -> P’(-y, x).

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

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4
Q

What is the rule to remember for Rotations?

A

Unless otherwise stated, all rotations are counterclockwise.

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5
Q

What are the rules for Rotations in the Coordinate Plane?

A

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

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

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