如图∠ACB=90°,AC=BC,BE⊥CE于点E,AD⊥CE于点D,CE与AB交于点F . 1.求证:△BEC≌△CDA. 2.若AD=9cm,DE=6cm,求BE和EF的长.
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![如图∠ACB=90°,AC=BC,BE⊥CE于点E,AD⊥CE于点D,CE与AB交于点F . 1.求证:△BEC≌△CDA. 2.若AD=9cm,DE=6cm,求BE和EF的长.](/uploads/image/z/12954232-64-2.jpg?t=%E5%A6%82%E5%9B%BE%E2%88%A0ACB%3D90%C2%B0%2CAC%3DBC%2CBE%E2%8A%A5CE%E4%BA%8E%E7%82%B9E%2CAD%E2%8A%A5CE%E4%BA%8E%E7%82%B9D%2CCE%E4%B8%8EAB%E4%BA%A4%E4%BA%8E%E7%82%B9F+.+++1.%E6%B1%82%E8%AF%81%EF%BC%9A%E2%96%B3BEC%E2%89%8C%E2%96%B3CDA%EF%BC%8E+++++++++++++++++++2.%E8%8B%A5AD%3D9cm%2CDE%3D6cm%2C%E6%B1%82BE%E5%92%8CEF%E7%9A%84%E9%95%BF.)
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