90 Degree Rotation: A Detailed Explanation and Examples - The Story of Mathematics - A History of Mathematical Thought from Ancient Times to the Modern Day

The -90 degree rotation is the rotation of a figure or points at 90 degrees in a clockwise direction. We explain it using many examples.

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Rotating shapes about the origin by multiples of 90° (article)

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90 Degree Rotation: A Detailed Explanation and Examples - The Story of Mathematics - A History of Mathematical Thought from Ancient Times to the Modern Day

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