http://demonstrations.wolfram.com/StellaOctangula
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The stella octangula (or stellated tetrahedron) is a compound of two tetrahedra. It can be interpreted as the stellation of a regular octahedron or as eight tetrahedra placed on the faces of an octahedron. Notice how its edges coincide with the twelve f...
Contributed by: Sandor Kabai
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