Find radius of the incircle of a regular tetrahedron the length of each side being units.

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- Jan 8th 2009, 06:29 AMpankajtetrahedron
Find radius of the incircle of a regular tetrahedron the length of each side being units.

- Jan 8th 2009, 01:35 PMearboth
I assume that you mean the insphere. If so have a look here:

Tetrahedron - Wikipedia, the free encyclopedia

Ifis the length of one edge then the radius of the insphere is*a*