- 问题详情:如图,在△ABC中,AB=AC=a,BC=b(a>b).在△ABC内依次作∠CBD=∠A,∠DCE=∠CBD,∠EDF=∠DCE.则EF等于()A. B. C. D.【回答】C【考点】相似三角形的判定与*质;等腰三角形的判定与*质.【分析】依次判定△ABC∽△BDC∽△CDE∽△DFE,根据相似三角形的对应边成比例的知识,可得出EF的长度.【...
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- AnalysisonbeatingcharacteristicsandpaperpropertiesforabacapulpHistoricallytradedtextileproductswhichwereinternationallytradedincommerciallysignificantquantitiespriorto1982,suchasbags,sacks,carpetbacking,cordage,luggage,mats,mattingsandcarpetstypicall...
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- 问题详情:如图,在△ABC中,AB=AC=a,M为底边BC上任意一点,过点M分别作AB、AC的平行线,交AC于P,交AB于Q,则四边形AQMP的周长为___________.【回答】2a 知识点:平面四边形单元测试题型:填空题...
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