已知线段AB,在线段AB的延长线取一点c,使BC=3AB,在BA的延长线上取一点D,使DA=3/2AB,E是BD的中点且EB=30cm。1.根据题意画出图形 2.求线段DC的长
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![已知线段AB,在线段AB的延长线取一点c,使BC=3AB,在BA的延长线上取一点D,使DA=3/2AB,E是BD的中点且EB=30cm。1.根据题意画出图形 2.求线段DC的长](/uploads/image/z/3524884-52-4.jpg?t=%E5%B7%B2%E7%9F%A5%E7%BA%BF%E6%AE%B5AB%2C%E5%9C%A8%E7%BA%BF%E6%AE%B5AB%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E5%8F%96%E4%B8%80%E7%82%B9c%2C%E4%BD%BFBC%3D3AB%2C%E5%9C%A8BA%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8A%E5%8F%96%E4%B8%80%E7%82%B9D%2C%E4%BD%BFDA%3D3%2F2AB%2CE%E6%98%AFBD%E7%9A%84%E4%B8%AD%E7%82%B9%E4%B8%94EB%3D30cm%E3%80%821.%E6%A0%B9%E6%8D%AE%E9%A2%98%E6%84%8F%E7%94%BB%E5%87%BA%E5%9B%BE%E5%BD%A2+2.%E6%B1%82%E7%BA%BF%E6%AE%B5DC%E7%9A%84%E9%95%BF)
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