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Omni-MATH / Find the angle of reflection θ such that a ball bounces 2012 times inside a 1×1 square before returning to its starting point.

Problem

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problem

Find the angle of reflection θ\theta such that a ball bounces 2012 times inside a 1×11 \times 1 square before returning to its starting point.
Plain-text mathematical notation (without MathML)
Find the angle of reflection θ such that a ball bounces 2012 times inside a 1×1 square before returning to its starting point.
Original LaTeX notation
Find the angle of reflection $\theta$ such that a ball bounces 2012 times inside a $1 \times 1$ square before returning to its starting point.

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Source and history

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