如图,已知正方形abcd边长为4,对角线ac、bd交于o点,e、f分别是边ab、bc上两点(与a、b、c不重合),且oe垂直of.1)求证be=cf2)若ef=根号10,求be的长
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![如图,已知正方形abcd边长为4,对角线ac、bd交于o点,e、f分别是边ab、bc上两点(与a、b、c不重合),且oe垂直of.1)求证be=cf2)若ef=根号10,求be的长](/uploads/image/z/14914872-0-2.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5%E6%AD%A3%E6%96%B9%E5%BD%A2abcd%E8%BE%B9%E9%95%BF%E4%B8%BA4%2C%E5%AF%B9%E8%A7%92%E7%BA%BFac%E3%80%81bd%E4%BA%A4%E4%BA%8Eo%E7%82%B9%2Ce%E3%80%81f%E5%88%86%E5%88%AB%E6%98%AF%E8%BE%B9ab%E3%80%81bc%E4%B8%8A%E4%B8%A4%E7%82%B9%28%E4%B8%8Ea%E3%80%81b%E3%80%81c%E4%B8%8D%E9%87%8D%E5%90%88%EF%BC%89%2C%E4%B8%94oe%E5%9E%82%E7%9B%B4of.1%29%E6%B1%82%E8%AF%81be%3Dcf2%EF%BC%89%E8%8B%A5ef%3D%E6%A0%B9%E5%8F%B710%2C%E6%B1%82be%E7%9A%84%E9%95%BF)
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