如图,在三角形ABC中,角BAC=90度,AB=AC,AE是过点一的直线,BD垂直于AE,CE垂直于AE,垂足分别是点D,若CE=3,BD=7,则DE=
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![如图,在三角形ABC中,角BAC=90度,AB=AC,AE是过点一的直线,BD垂直于AE,CE垂直于AE,垂足分别是点D,若CE=3,BD=7,则DE=](/uploads/image/z/12675234-66-4.jpg?t=%E5%A6%82%E5%9B%BE%EF%BC%8C%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%EF%BC%8C%E8%A7%92BAC%3D90%E5%BA%A6%EF%BC%8CAB%3DAC%2CAE%E6%98%AF%E8%BF%87%E7%82%B9%E4%B8%80%E7%9A%84%E7%9B%B4%E7%BA%BF%EF%BC%8CBD%E5%9E%82%E7%9B%B4%E4%BA%8EAE%2CCE%E5%9E%82%E7%9B%B4%E4%BA%8EAE%2C%E5%9E%82%E8%B6%B3%E5%88%86%E5%88%AB%E6%98%AF%E7%82%B9D%2C%E8%8B%A5CE%3D3%EF%BC%8CBD%3D7%EF%BC%8C%E5%88%99DE%3D)
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