(贵阳专用)2019中考数学总复习第1部分教材同步复习第四章三角形课时16等腰三角形与直角三角形权威预测.doc

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(贵阳专用)2019中考数学总复习第1部分教材同步复习第四章三角形课时16等腰三角形与直角三角形权威预测.doc_第1页
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1第一部分 第四章 课时 161如图,正方形网格中,网格线的交点称为格点,已知 A, B 是两格点,如果 C 也是图中的格点,且使得 ABC 为等腰三角形,则点 C 的个数是( D )A6 B8 C9 D102如图,在等边三角形 ABC 中, D 为边 BC 上的任意一点,过点 D 分别作 DE AB 交 AC于点 E, DF AC 交 AB 于点 F.已知 ABC 的周长是 9 cm,则 DE DF 的长度之和为( A )A 3 cm B 4 cm C 5 cm D 6 cm3在矩形 ABCD 中, AB3, BC4,点 E 是 DC 上一点,将 ADE 沿着 AE 折叠,使得AD 边与 AC 边重合得 AEF,则 DE_ _.43

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