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Can Regular Tetrahedra be Glued Together Face to Face to form a Ring?
Published online by Cambridge University Press: 03 November 2016
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Suppose someone gave you a large collection of identical regular tetrahedra. Would it be possible to glue them together face to face in such a way that you formed a nontrivial ring, or doughnut, in the sense that, during the glueing process, you could glue a tetrahedron both to your last tetrahedron and your first? Tetrahedra would be allowed to cut into each other if necessary.
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- Copyright © Mathematical Association 1972
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