:如图,四边形ABDF中,点C、E分别在AF,DF上,且AB=AC,BD=DE,∠BDE=2∠ABC,M为CE中点. 求证:(1)AM⊥DM
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![:如图,四边形ABDF中,点C、E分别在AF,DF上,且AB=AC,BD=DE,∠BDE=2∠ABC,M为CE中点. 求证:(1)AM⊥DM](/uploads/image/z/6939695-47-5.jpg?t=%3A%E5%A6%82%E5%9B%BE%2C%E5%9B%9B%E8%BE%B9%E5%BD%A2ABDF%E4%B8%AD%2C%E7%82%B9C%E3%80%81E%E5%88%86%E5%88%AB%E5%9C%A8AF%2CDF%E4%B8%8A%2C%E4%B8%94AB%3DAC%2CBD%3DDE%2C%E2%88%A0BDE%3D2%E2%88%A0ABC%2CM%E4%B8%BACE%E4%B8%AD%E7%82%B9.+%E6%B1%82%E8%AF%81%EF%BC%9A%EF%BC%881%EF%BC%89AM%E2%8A%A5DM)
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