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A woman is 160 160cm tall. What is the minimum vertical length of a mirror in which she can see her entire body while standing

A woman is 160 160cm tall. What is the minimum vertical length of a mirror in which she can see her entire body while standing upright? Hint: Consider the ray diagram below, of the rays that enable her to see her feet and the top of her head. Use what you know about the law of reflection, together with a bit of geometry

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