P cf. pyraminx Fire is the least stable and most mobile, so it is made up of regular triangular pyramids (tetrahedra). .... One icosahedron of water with twenty triangular sides becomes two octahedra of air (16 faces) and one pyramid of fire (4 faces). As the final transformation of water is to air and finally to the fire of the heavens, one icosahedron of water can ultimately become five pyramids of fire. http://www.class.uidaho.edu/ngier/polyhedra/goc.htm

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