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Mathematics for IGCSE & O level - Transformations (Section 1 - No. 40)

A point at (5, 2) is rotated 180 degrees about the origin. The resulting point is:
(2,5)
(-5,-2)
(5, -2)
(-2, -5)

解释

180 degree rotation is (x,y) to (-x,-y).

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