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Description
here's a cube that contains eight regular tetrahedra, twelve oblique tetrahedra, and an inner mystery shape that appears at the end, surviving the explosion. can you compute all the volumes and angles involved here?

Description
here's a cube that contains eight regular tetrahedra, twelve oblique tetrahedra, and an inner mystery shape that appears at the end, surviving the explosion. can you compute all the volumes and angles involved here?