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八年级数学：矩形翻折后，怎么求AG的值？勾股定理，经典常考题型
八年级数学：矩形翻折后，怎么求AG的值？勾股定理，经典常考题型
初中数学，直角三角形，勾股定理及逆定理，基础训练，培优专题138/169
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