数学题提问,理科高手回答(北师大版,勾股定理,练习册)折叠长方形ABCD的一边AD,点D落在BC的边上的D'处,AE是折痕,若AB=8cm,CD'=4cm,求AD的长
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![数学题提问,理科高手回答(北师大版,勾股定理,练习册)折叠长方形ABCD的一边AD,点D落在BC的边上的D'处,AE是折痕,若AB=8cm,CD'=4cm,求AD的长](/uploads/image/z/11415937-49-7.jpg?t=%E6%95%B0%E5%AD%A6%E9%A2%98%E6%8F%90%E9%97%AE%2C%E7%90%86%E7%A7%91%E9%AB%98%E6%89%8B%E5%9B%9E%E7%AD%94%EF%BC%88%E5%8C%97%E5%B8%88%E5%A4%A7%E7%89%88%2C%E5%8B%BE%E8%82%A1%E5%AE%9A%E7%90%86%2C%E7%BB%83%E4%B9%A0%E5%86%8C%EF%BC%89%E6%8A%98%E5%8F%A0%E9%95%BF%E6%96%B9%E5%BD%A2ABCD%E7%9A%84%E4%B8%80%E8%BE%B9AD%2C%E7%82%B9D%E8%90%BD%E5%9C%A8BC%E7%9A%84%E8%BE%B9%E4%B8%8A%E7%9A%84D%27%E5%A4%84%2CAE%E6%98%AF%E6%8A%98%E7%97%95%2C%E8%8B%A5AB%3D8cm%2CCD%27%3D4cm%2C%E6%B1%82AD%E7%9A%84%E9%95%BF)
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