A coin is a circle on the table, an oval from the side, and almost a line at eye level. What changed? - Answer & Hint

A coin is a circle on the table, an oval from the side, and almost a line at eye level. What changed?

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Hint: The object stays still; the observer moves.

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The answer is

The viewing angle

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The coin has not changed shape. Its apparent shape changes because the viewing angle changes.

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