A Conversation for The Soma Cube
Rhomboid solids
gareis Started conversation Jun 30, 2003
Is there any essential difference between a Soma cube and a Soma rhomboid solid (shape with six faces, each of which is a rhombus)?
Rhomboid solids
Pimms Posted Jun 30, 2003
Off the top of my head 
I'd say yes, as once the pieces have been formed into rhomboids they will lose some of their symmetries (particularly rotational symmetries) that allow the pieces to be re-formed into different solutions to the puzzle.
Pimms 
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Rhomboid solids
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