Problem 14 of 7
Identify the rotations that carry a square onto itself.
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determine rotational symmetry angles.
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Figure must be centered at its rotational symmetry center.
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Solution
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1. Locate the center of the rectangle.
2. Test rotations by 90-degree increments.
3. Keep only rotations that make the figure overlap exactly.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
90 degrees for a non-square rectangle.