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2019中考数学一轮复习第一部分教材同步复习第四章三角形第16讲一般三角形及其性质权威预测.doc

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2019中考数学一轮复习第一部分教材同步复习第四章三角形第16讲一般三角形及其性质权威预测.doc_第1页
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1第一部分 第四章 第 16 讲1如图， AB CD， BE 交 CD 于点 F， B45， E21，则 D_24_.2如图，在 ABC 中， D， E 是 AC， BC 的中点， S CDE4，则 S ABC_16_.

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