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28-03-2017
Mathematics

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I need to know the easiest trick to do rotations

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acutler1243 acutler1243

28-03-2017

90º (-270º): (x,y) ---> (y, -x)
180º (-180º): (x, y) ---> (-x, -y)
270º (-90º): (x,y) ---> (-y, x)

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