在 Rt三角形ABC中,角ACB=90度,sinB=3/5,D是BC上一点DE垂直AB于点E,CD=DE,AC+CD=9,求BC的长
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![在 Rt三角形ABC中,角ACB=90度,sinB=3/5,D是BC上一点DE垂直AB于点E,CD=DE,AC+CD=9,求BC的长](/uploads/image/z/6644099-11-9.jpg?t=%E5%9C%A8+Rt%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2C%E8%A7%92ACB%3D90%E5%BA%A6%2CsinB%3D3%2F5%2CD%E6%98%AFBC%E4%B8%8A%E4%B8%80%E7%82%B9DE%E5%9E%82%E7%9B%B4AB%E4%BA%8E%E7%82%B9E%2CCD%3DDE%2CAC%2BCD%3D9%2C%E6%B1%82BC%E7%9A%84%E9%95%BF)
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