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[几何] 请教:一道立几竞赛试题

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wdjlhx posted 2014-7-2 19:03 |Read mode
(2011年全国高中数学联赛天津初赛试题)设O-ABCD是正四棱锥,其中OA= ,BC=2.以O为球心,以1为半径作一个球,则这个球与正四棱锥相交部分的体积是        .

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青青子衿 posted 2019-4-19 19:10
设O-ABCD是正四棱锥,其中OA=根号3 ,BC=2.以O为球心,以1为半径作一个球,则这个球与正四棱锥相交部分的体积是 ...
wdjlhx 发表于 2014-7-2 19:03
\[\dfrac{2\pi}{9}\]

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