如图,△ABC中,AB=AC,在AB上取一点E,在AC的延长线上取一点F,使CF=BE,连接EF,交BC于点D.求证:DE=D
如图,△ABC中,AB=AC,在AB上取一点E,在AC的延长线上取一点F,使CF=BE,连接EF,交BC于点D.求证:DE=DF....
如图,△ABC中,AB=AC,在AB上取一点E,在AC的延长线上取一点F,使CF=BE,连接EF,交BC于点D.求证:DE=DF.
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