已知在平面直角坐标系中，已知A（3，4），B（3，﹣1），C（﹣3，﹣2），D（﹣2，3）._刷题宝

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已知在平面直角坐标系中，已知A（3，4），B（3，﹣1），C（﹣3，﹣2），D（﹣2，3）.

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