一、证明:BPE=BCE=Rt,∴四边形BPCE内接于圆,∴BEP=BCP=45,∴EBP=45,∴PB=PE;连结BD交AC于点O,OBP......
一、证明:BPE=BCE=Rt,∴四边形BPCE内接于圆,∴BEP=BCP=45,∴EBP=45,∴PB=PE;连结BD交AC于点O,OBP......
FPD=40 理由如下:EP∥AB(已知) ∴EPF=CEP=50(两直线平行,内错角相等)∴PFD=EPF=50(两直线平行,......
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