(1)设a,b,c分别为等腰梯形ABCD上底,下底和腰的长,m为对角线的长.(1)设a,b,c分别为等腰梯形ABCD上底,下底和腰的长,m为对角线的长,求证:m的方=C的方+ab(2)在矩形ABCD中,AC,BD相交于O,OE垂
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![(1)设a,b,c分别为等腰梯形ABCD上底,下底和腰的长,m为对角线的长.(1)设a,b,c分别为等腰梯形ABCD上底,下底和腰的长,m为对角线的长,求证:m的方=C的方+ab(2)在矩形ABCD中,AC,BD相交于O,OE垂](/uploads/image/z/8800797-21-7.jpg?t=%EF%BC%881%EF%BC%89%E8%AE%BEa%2Cb%2Cc%E5%88%86%E5%88%AB%E4%B8%BA%E7%AD%89%E8%85%B0%E6%A2%AF%E5%BD%A2ABCD%E4%B8%8A%E5%BA%95%2C%E4%B8%8B%E5%BA%95%E5%92%8C%E8%85%B0%E7%9A%84%E9%95%BF%2Cm%E4%B8%BA%E5%AF%B9%E8%A7%92%E7%BA%BF%E7%9A%84%E9%95%BF%EF%BC%8E%EF%BC%881%EF%BC%89%E8%AE%BEa%2Cb%2Cc%E5%88%86%E5%88%AB%E4%B8%BA%E7%AD%89%E8%85%B0%E6%A2%AF%E5%BD%A2ABCD%E4%B8%8A%E5%BA%95%2C%E4%B8%8B%E5%BA%95%E5%92%8C%E8%85%B0%E7%9A%84%E9%95%BF%2Cm%E4%B8%BA%E5%AF%B9%E8%A7%92%E7%BA%BF%E7%9A%84%E9%95%BF%2C%E6%B1%82%E8%AF%81%EF%BC%9Am%E7%9A%84%E6%96%B9%EF%BC%9DC%E7%9A%84%E6%96%B9%2Bab%EF%BC%882%EF%BC%89%E5%9C%A8%E7%9F%A9%E5%BD%A2ABCD%E4%B8%AD%2CAC%2CBD%E7%9B%B8%E4%BA%A4%E4%BA%8EO%2COE%E5%9E%82)
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