A regular octahedron can be used as a "tile" for various puzzle; we find it when we put to...
A tetrahedron with two faces with the shape of equilateral triangles (the red ones in the ...
A pyramid with a rhombus with angles 60° and 120° as a base and four triangles (two equi...
A regular tetrahedron, made of 4 triangles. You can see a net. How many triangles do we ne...
A regular tetrahedron with double side than this one. You can see in a net how many triang...
Two mirrors at a particular angle show the rotation axes of the cube: here we see two mirr...
Does this trade-mark represent three tiles of a plane tessellation or three tridimensional...
Does this trade-mark represent three tiles of a plane tessellation or three tridimensional...
The net of a polyhedron, used as a "tile" in a puzzle: six of these polyhedra (three with ...
The net of a polyhedron, used as a "tile" in a puzzle: four of these polyhedra form a cube...
