如图 ad是△abc的高,点e,f在边bc上,点h在边ab上,点g在边ac上,ad=80cm,bc=120cm.(1)若四边形efgh是正方形,求正方形的面积.(2)若四边形efgh是长方形,且长是宽的2倍,求长和宽.
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![如图 ad是△abc的高,点e,f在边bc上,点h在边ab上,点g在边ac上,ad=80cm,bc=120cm.(1)若四边形efgh是正方形,求正方形的面积.(2)若四边形efgh是长方形,且长是宽的2倍,求长和宽.](/uploads/image/z/2558874-66-4.jpg?t=%E5%A6%82%E5%9B%BE+ad%E6%98%AF%E2%96%B3abc%E7%9A%84%E9%AB%98%2C%E7%82%B9e%2Cf%E5%9C%A8%E8%BE%B9bc%E4%B8%8A%2C%E7%82%B9h%E5%9C%A8%E8%BE%B9ab%E4%B8%8A%2C%E7%82%B9g%E5%9C%A8%E8%BE%B9ac%E4%B8%8A%2Cad%3D80cm%2Cbc%3D120cm.%EF%BC%881%EF%BC%89%E8%8B%A5%E5%9B%9B%E8%BE%B9%E5%BD%A2efgh%E6%98%AF%E6%AD%A3%E6%96%B9%E5%BD%A2%2C%E6%B1%82%E6%AD%A3%E6%96%B9%E5%BD%A2%E7%9A%84%E9%9D%A2%E7%A7%AF.%EF%BC%882%EF%BC%89%E8%8B%A5%E5%9B%9B%E8%BE%B9%E5%BD%A2efgh%E6%98%AF%E9%95%BF%E6%96%B9%E5%BD%A2%2C%E4%B8%94%E9%95%BF%E6%98%AF%E5%AE%BD%E7%9A%842%E5%80%8D%2C%E6%B1%82%E9%95%BF%E5%92%8C%E5%AE%BD.)
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