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哎，在网上找到的这个公式怎么会这样呢？谢谢YCIn Reply To:你忽越了一个小问题 套公式时要注意AD=a,BD=b,CD=c,AB=l,BC=m,AC=n 与题目的各边要对应 Posted by:ecjtuyc at 2006-12-24 23:05:39 比如说三棱椎OABC，O为顶点，ABC为底面三角形 则 a－OA b－OB c－OC l－AB m－BC n－CA Followed by: Post your reply here: |
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