(2014?思明区质检)如图AB是圆O上两点在△ABC中,AB=AC⊙O是△ABC的外接圆,AE⊥AB交BC于点D交⊙O于点E,F在DA的延长线上且AF=AD.若AF=3,tan∠ABD=34求⊙O的直径....
(2014?思明区质检)如图AB是圆O上两点,在△ABCΦAB=AC,⊙O是△ABC的外接圆AE⊥AB交BC于点D,交⊙O于点EF在DA的延长线上,且AF=AD.若AF=3tan∠ABD=34,求⊙O的直径.
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