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[几何] 四川2018初赛外接球问题

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郝酒 Posted 2018-6-27 10:31 |Read mode
在三棱锥P-ABC中,三条棱PA、PB、PC两两垂直,且PA=1,PB=2,PC=2,若点Q为三棱锥P-ABC外接球的球面上任一点,则Q到面ABC距离的最大值为多少?

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kuing Posted 2018-6-27 10:48
你补了长方体没?

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敬畏数学 Posted 2018-6-27 13:21
陈旧的题。多刷一下题。

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 Author| 郝酒 Posted 2018-6-27 15:24
回复 3# 敬畏数学

感觉应该是很老的题,现在很少考球了。半径加球心到面的距离哈

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敬畏数学 Posted 2018-6-28 08:14
类似某大考的所谓最难题,结果变成垃圾题,几乎人人会。降维!高了就降。也不用这些高大武.器,胡思乱想就得答案。

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