如图,已知EF垂直于MN,且与正方形ABCD的对边分别交于E,F,M,N,求证:EF=MN.是沪科版八年级下的基础训练上的69页第10题.
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![如图,已知EF垂直于MN,且与正方形ABCD的对边分别交于E,F,M,N,求证:EF=MN.是沪科版八年级下的基础训练上的69页第10题.](/uploads/image/z/4044320-8-0.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5EF%E5%9E%82%E7%9B%B4%E4%BA%8EMN%2C%E4%B8%94%E4%B8%8E%E6%AD%A3%E6%96%B9%E5%BD%A2ABCD%E7%9A%84%E5%AF%B9%E8%BE%B9%E5%88%86%E5%88%AB%E4%BA%A4%E4%BA%8EE%2CF%2CM%2CN%2C%E6%B1%82%E8%AF%81%EF%BC%9AEF%3DMN.%E6%98%AF%E6%B2%AA%E7%A7%91%E7%89%88%E5%85%AB%E5%B9%B4%E7%BA%A7%E4%B8%8B%E7%9A%84%E5%9F%BA%E7%A1%80%E8%AE%AD%E7%BB%83%E4%B8%8A%E7%9A%8469%E9%A1%B5%E7%AC%AC10%E9%A2%98.)
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