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Construct (with ruler and compass) a square given one point from each side.

I see a very interesting question.Answer, but there is no resolution, I do not know the reason why such a mapping?Is not there other mapping methods?

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    I'm not sure to understand the question... Do you want a proof that this solution works?2012-09-29
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    I think this is the same set of problems I have (it's also Problem 20 in mine). The problems are great, apart from some of the uglier algebra ones (the coefficients were engineered to give those problems closed-form solutions).2015-07-09
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    @tianzhidaosunyouyu: This is from _Jewish Problems_ by Tanya Khovanova and Alexey Radul.2016-08-26

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