A Tetrahedron with Edges of Given Length

This Demonstration constructs a tetrahedron with edges of given length using a Cayley–Menger determinant.


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The Cayley–Menger determinant gives the volume of a simplex in dimensions.
gives the area for a plane triangle and is a form of Heron's formula.
gives the content of the 3-simplex, that is, the volume of the general tetrahedron.
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