如果AC 和 BD正交，你们是对的 because area = h*w/2。but
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送交者: cornbug 于 2014-03-06, 12:16:45:
回答: 提上来 由 cornbug 于 2014-03-06, 10:05:08:
how do you know AC and BD are orthogonal? This is what I mean that there is no solution to the problem.
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