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Thread: Euclidean Geometry

  1. #1
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    Euclidean Geometry

    if AB < CD, prove that 2AB < 2CD
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  2. #2
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    Re: Euclidean Geometry

    First, AB is the length of the segment from A to B so these are numbers. To prove that "if AB< CD then 2AB< 2CD" show that, from AB< CD, it follows that CD- AB> 0. Then use the fact that the product of two positive numbers is positive.
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