PROTOTYPES
Tetrahedron 006
Tetrahedron 005
Tetrahedron 004
Tetrahedron 003
Tetrahedron 002
Tetrahedron 001
Unfolding: square, pentagon, hexagon and heptagon
Tetrahedron 006
Tetrahedron 005
Tetrahedron 004
Tetrahedron 003
Tetrahedron 002
Tetrahedron 001
Unfolding: square, pentagon, hexagon and heptagon