如图,四边形ABCD中,AD平行BC,点E在CB的延长线上,连接DE,交AB于点F,连接DB,∠AFD=∠DBE,且DE方=BE乘CE.1.求证:∠DBE=∠CDE2.当BD平分∠ABC时,求证:四边形ABCD是菱形.
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![如图,四边形ABCD中,AD平行BC,点E在CB的延长线上,连接DE,交AB于点F,连接DB,∠AFD=∠DBE,且DE方=BE乘CE.1.求证:∠DBE=∠CDE2.当BD平分∠ABC时,求证:四边形ABCD是菱形.](/uploads/image/z/11421932-68-2.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E4%B8%AD%2CAD%E5%B9%B3%E8%A1%8CBC%2C%E7%82%B9E%E5%9C%A8CB%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8A%2C%E8%BF%9E%E6%8E%A5DE%2C%E4%BA%A4AB%E4%BA%8E%E7%82%B9F%2C%E8%BF%9E%E6%8E%A5DB%2C%E2%88%A0AFD%3D%E2%88%A0DBE%2C%E4%B8%94DE%E6%96%B9%3DBE%E4%B9%98CE.1.%E6%B1%82%E8%AF%81%EF%BC%9A%E2%88%A0DBE%3D%E2%88%A0CDE2.%E5%BD%93BD%E5%B9%B3%E5%88%86%E2%88%A0ABC%E6%97%B6%2C%E6%B1%82%E8%AF%81%EF%BC%9A%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E6%98%AF%E8%8F%B1%E5%BD%A2.)
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