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Which counterexample shows that the conjecture "Every parallelogram is also a rectangle" is false?
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Sep 26, 2018
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Which counterexample shows that the conjecture "Every parallelogram is also a rectangle" is false?
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Khoa Le
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Yep that'd be false since they are also rectangles
TorosFanny
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Sep 28, 2018
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A parallelogram without four right angles would prove that to be false.
Malcolm Murdoch
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Oct 1, 2018
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