初中数学全等专题全等三角形判定(上) .pdf

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1、初中数学全等专题全等三角形判定（上）一、单选题(共5道，每道20分)1.如图，直线l过正方形ABCD的顶点B，点A、C到直线l的距离分别是1和2，则EF的长为（）A.2B.3C.4D.62.如图，已知点E在△ABC的外部，点D在BC边上，DE交AC于F，若∠1=∠2=∠3，AC=AE，则有()A.△ABD≌△AFDB.△AFE≌△ADCC.△AEF≌△DFCD.△ABC≌△ADE3.如图，点C为线段AB上一点，△DAC和△EBC均是等边三角形，AE、BD分别与CD、CE交于点M、N，有如下结论：①△ACE≌△DCB；②CM＝CN；③AC=DN其中，正确结论的个数是()个．A.0B.1C.2D

2、.34.如图，OA=OB，OC=OD，∠O=50°，∠D=35°，则∠AEC等于（）A.60°B.50°C.45°D.30°5.如图，E、F在线段BC上，AB=DC，AE=DF，BF=CE．下列问题不一定成立的是（）A.∠B=∠CB.AF∥DEC.AE=DED.AB∥DC精品文档————————————————————————————————————————————————————————————————————————————————————————————————————————————————精品文档精品资料精品文档———————————————————————————————————

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