如图所示,在△ABC中,∠BAC=2∠B,AB=2AC,AE平分
如图所示,在△ABC中,∠BAC=2∠B,AB=2AC,AE平分
如图所示,在△ABC中,AD平分∠BAC,CD⊥AC,AD=BD.求证:AB=2AC.
如图所示,在△ABC中,E是AB上一点,AE=AC,AD平分∠BAC,EF||BC,连接EC.求证:EC平分∠DEF.
已知△ABC中,∠BAC=2∠B,AB=2AC,AE平分∠BAC,求证:∠C=90°
已知△ABC中,∠BAC=2∠B,AB=2AC,AE平分∠BAC.求证∠C=90°
如图所示,在△ABC中,AD平分∠BAC,AB+BD=AC.求∠B:∠C的值
已知,如图,△ABC中∠BAC=2∠B,AB=2AC,AE平分∠CAB求证:AE=2CE
已知,如图,△ABC中,∠BAC=2∠B,AB=2AC,AE平分∠CAB,求证:AE=2CE
如图,在△ABC中,AE平分∠BAC,BE⊥AE,∠ABE=2∠C,求证:AC-AB=2BE
如图,已知三角形ABC中,角BAC=2角B,AB=2AC,AE平分角BAC
已知,如图,△ABC中,∠BAC=2∠B,AB=2AC,AE平分∠CAB,求证:∠C=90°
如图,在△ABC中,AD平分∠BAC,在AB上截取AE=AC,连接DE,已知DE=2cm,BD=3cm;