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Mathematics for IGCSE & O level - Transformations (Section 3 - No. 2)

A shape is rotated 90 degrees clockwise around the origin. The point (2, 5) will become:
(5, -2)
(-2, -5)
(2, -5)
(-5, 2)

解释

90 degrees clockwise: (x, y) -> (y, -x).

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