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[几何] 外接球半径

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_xiao posted 2018-5-12 13:06 |Read mode

请教一下.此题的解法.

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isee posted 2018-5-12 15:33

回复 1# _xiao

提示：此三棱锥是对棱相等的特殊四面体，可以置于某个长方体中(各棱是面对角线），画出此长方体就好办了。

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original poster _xiao posted 2018-5-18 00:28

回复 2# isee

谢谢指点.按照您说的思路.已经完美解决啦.

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