已知:如图,在△ABC中,AB=AC,AD⊥BC垂足为点D,AN是△ABC外角∠CAM的平分线,CE⊥AN,垂足为点E.(1)试说明四边形ADCE为矩形;(2)当△ABC满足什么条件时,四边形ADCE是一个正方形?给出证明.第一问我
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![已知:如图,在△ABC中,AB=AC,AD⊥BC垂足为点D,AN是△ABC外角∠CAM的平分线,CE⊥AN,垂足为点E.(1)试说明四边形ADCE为矩形;(2)当△ABC满足什么条件时,四边形ADCE是一个正方形?给出证明.第一问我](/uploads/image/z/6931535-23-5.jpg?t=%E5%B7%B2%E7%9F%A5%3A%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2CAB%3DAC%2CAD%E2%8A%A5BC%E5%9E%82%E8%B6%B3%E4%B8%BA%E7%82%B9D%2CAN%E6%98%AF%E2%96%B3ABC%E5%A4%96%E8%A7%92%E2%88%A0CAM%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BF%2CCE%E2%8A%A5AN%2C%E5%9E%82%E8%B6%B3%E4%B8%BA%E7%82%B9E.%EF%BC%881%EF%BC%89%E8%AF%95%E8%AF%B4%E6%98%8E%E5%9B%9B%E8%BE%B9%E5%BD%A2ADCE%E4%B8%BA%E7%9F%A9%E5%BD%A2%EF%BC%9B%EF%BC%882%EF%BC%89%E5%BD%93%E2%96%B3ABC%E6%BB%A1%E8%B6%B3%E4%BB%80%E4%B9%88%E6%9D%A1%E4%BB%B6%E6%97%B6%2C%E5%9B%9B%E8%BE%B9%E5%BD%A2ADCE%E6%98%AF%E4%B8%80%E4%B8%AA%E6%AD%A3%E6%96%B9%E5%BD%A2%3F%E7%BB%99%E5%87%BA%E8%AF%81%E6%98%8E.%E7%AC%AC%E4%B8%80%E9%97%AE%E6%88%91)
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