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I found this method to find the volume of a tetrahedron given the length of edges on Wikipedia

enter image description here

I found this Interesting, and was looking for a formal proof, but didn't find it anywhere.

Could someone please show how this is proven?

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  • $\begingroup$ For completeness, you should include the method/formula in your question. $\endgroup$ – Travis Sep 13 '14 at 15:41
  • $\begingroup$ @Travis I found it too long to type, so I took a screenshot $\endgroup$ – pkwssis Sep 13 '14 at 15:42

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