- 問題詳情:如圖,在△ABC中,AB=AC=a,BC=b(a>b).在△ABC內依次作∠CBD=∠A,∠DCE=∠CBD,∠EDF=∠DCE.則EF等於()A. B. C. D.【回答】C【考點】相似三角形的判定與*質;等腰三角形的判定與*質.【分析】依次判定△ABC∽△BDC∽△CDE∽△DFE,根據相似三角形的對應邊成比例的知識,可得出EF的長度.【...
- 31478
- 問題詳情:如圖,在△ABC中,AB=AC=a,M為底邊BC上任意一點,過點M分別作AB、AC的平行線,交AC於P,交AB於Q,則四邊形AQMP的周長為___________.【回答】2a 知識點:平面四邊形單元測試題型:填空題...
- 16613
- AnalysisonbeatingcharacteristicsandpaperpropertiesforabacapulpHistoricallytradedtextileproductswhichwereinternationallytradedincommerciallysignificantquantitiespriorto1982,suchasbags,sacks,carpetbacking,cordage,luggage,mats,mattingsandcarpetstypicall...
- 26954