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时间:2017-12-22
《七年级数学下册同步拔高(综合 强化)北师版 三角形全等综合训练》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、七年级数学下册同步拔高(综合+强化)北师版三角形全等综合训练一、单选题(共5道,每道20分)1.如图,Rt△ABC中,AB⊥AC,AD⊥BC,BE平分∠ABC,交AD于E,EF∥AC,下列结论一定成立的是() A.AB=BF B.AE=ED C.AD=DC D.∠ABE=∠DFE 2.如图,D是AB边上的中点,将△ABC沿过D的直线折叠,使点A落在BC上F处,若∠B=50°,则∠BDF的度数为() A.50° B.60° C.70° D.80° 3.如图,在△ABC中,AB=AC,AD是△ABC的角平分线,DE⊥AB
2、,DF⊥AC,垂足分别为E,F.则下列四个结论:①AD上任意一点到点C,B的距离相等;②AD上任意一点到边AB,AC的距离相等;③BD=CD,AD⊥BC;④∠BDE=∠CDF.其中,正确的个数为() 第3页共3页A.1个 B.2个 C.3个 D.4个 4.如图,在△ABC中,D是BC的中点,DE⊥AB,DF⊥AC,垂足分别是E、F,BE=CF.则图中全等三角形有()对. A.1 B.2 C.3 D.4 5.如图所示,在△ABC中,∠ABC=90°,D是△ABC内一点,将△ADB绕点B旋转至△BD′C,△BD′C与△A
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