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Big Ideas Math Integrated I, 2016 View details

3. Rotations

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Exercise 4 Page 561

Only consider rotations about the origin and rotations of 90^(∘), 180^(∘) and 270^(∘).

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Practice makes perfect

We will only consider rotations about the origin and rotations of 90^(∘), 180^(∘) and 270^(∘). The following rules apply. Rotation of 90^(∘):& (a,b) → (- b,a) Rotation of 180^(∘):& (a,b) → (- a,- b) Rotation of 270^(∘):& (a,b) → (b,- a) For any other angle of rotation, you need to use a compass.