如图,在△ABC中,AB=AC,∠BAC=90,点D是BC边上的中点,DE如图,在△ABC中,AB=AC,∠BAC=90°,D为BC中点,DE⊥DF,AD与EF相交于点G,(1)试判断∠AGF与∠AED的大小关系,证明你的结论.(2)若BE=12,CF=5,求△DEF的面积.
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![如图,在△ABC中,AB=AC,∠BAC=90,点D是BC边上的中点,DE如图,在△ABC中,AB=AC,∠BAC=90°,D为BC中点,DE⊥DF,AD与EF相交于点G,(1)试判断∠AGF与∠AED的大小关系,证明你的结论.(2)若BE=12,CF=5,求△DEF的面积.](/uploads/image/z/8536080-48-0.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3DAC%2C%E2%88%A0BAC%3D90%2C%E7%82%B9D%E6%98%AFBC%E8%BE%B9%E4%B8%8A%E7%9A%84%E4%B8%AD%E7%82%B9%2CDE%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3DAC%2C%E2%88%A0BAC%3D90%C2%B0%2CD%E4%B8%BABC%E4%B8%AD%E7%82%B9%2CDE%E2%8A%A5DF%2CAD%E4%B8%8EEF%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9G%2C%281%29%E8%AF%95%E5%88%A4%E6%96%AD%E2%88%A0AGF%E4%B8%8E%E2%88%A0AED%E7%9A%84%E5%A4%A7%E5%B0%8F%E5%85%B3%E7%B3%BB%2C%E8%AF%81%E6%98%8E%E4%BD%A0%E7%9A%84%E7%BB%93%E8%AE%BA.%EF%BC%882%EF%BC%89%E8%8B%A5BE%3D12%2CCF%3D5%2C%E6%B1%82%E2%96%B3DEF%E7%9A%84%E9%9D%A2%E7%A7%AF.)
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