What 2 combined solid shapes have 8 faces,12 edges, and 8 vertices?
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M$2 Answers
it has 8 faces, 12 edges and 8 vertices
a Stellated octahedron
It was named by Johannes Kepler in 1609, though it was known to earlier geometers.
http://www.uwgb.edu/DutchS/Graphics-Other/POLYHEDR/STELOCT1.GIF
http://upload.wikimedia.org/wikipedia/commons/7/79/Compound_of_two_tetrahedra.png
So kerryk, you were right-only that the pyramids needed to be intertwined
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M$http://www.mathsisfun.com/geometry/images/triangular-pyramid-height.jpg
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M$Oh I see what you mean. I didn't understand the question completely. Thanks. I'll think of something else
I think that's not the answer. He mentions "solids combined" That may mean they are "glued" together through a common face or fit one into another (if one is convex and the other concave)

