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如图,OC平分∠AOB,点D,E分别在OA,OB上,点P在OC上且有PD=PE.求证:∠PDO =∠PEB.
如图,BE⊥AC、CF⊥AB于点E、F,BE与CF交于点D,DE=DF,连结AD。求证:(1)∠FAD=∠EAD(2)BD="CD"
如图在四边形ABCD中,AB=AD,∠ABC=∠ADC,求证BC=DC.
如图,在△ABC中,AB=AC,∠BAC=120°,点M在边BC上,AM=BM。求证:CM=2BM
如图所示,AB=AD,AC=AE,∠1=∠2,求证:BC=DE.