一些初级几何题如图,E是平行四边形ABCD外一点,对角线AC与BD相交于点O,且OE垂直于BE,AE垂直于CE.求证:四边形ABCD是矩形.
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![一些初级几何题如图,E是平行四边形ABCD外一点,对角线AC与BD相交于点O,且OE垂直于BE,AE垂直于CE.求证:四边形ABCD是矩形.](/uploads/image/z/14964459-51-9.jpg?t=%E4%B8%80%E4%BA%9B%E5%88%9D%E7%BA%A7%E5%87%A0%E4%BD%95%E9%A2%98%E5%A6%82%E5%9B%BE%2CE%E6%98%AF%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E5%A4%96%E4%B8%80%E7%82%B9%2C%E5%AF%B9%E8%A7%92%E7%BA%BFAC%E4%B8%8EBD%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9O%2C%E4%B8%94OE%E5%9E%82%E7%9B%B4%E4%BA%8EBE%2CAE%E5%9E%82%E7%9B%B4%E4%BA%8ECE%EF%BC%8E%E6%B1%82%E8%AF%81%EF%BC%9A%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E6%98%AF%E7%9F%A9%E5%BD%A2%EF%BC%8E)
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