(江西专用)2019中考数学总复习第一部分教材同步复习第四章三角形第15讲一般三角形及其性质权威预测.doc

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1第一部分 第四章 第 15 讲1如图, BD EF,若 ABC30, AEF100,则 A 的度数为( A )A70 B60C50 D402已知点 D, E, F 分别是 ABC 的边 AB, AC, BC 的中点若 ABC 的周长为 16,则 DEF 的周长为( C )A2 B4C8 D32

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