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来自维基百科,自由的百科全书
德古阿定理是勾股定理的三维形式,以法国数学家让·保罗·德古阿·德马尔弗(Jean Paul de Gua de Malves)命名。
若从一个正六面体截下一角O形成一截角锥(记为ABCO),则
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