We can divide the 20 vertices of a dodecahedron in 5 groups of 4 vertices, so that the poi...
A simple way to understand why there are only five regular polyhedra is to examine how reg...
The only regular tessellation of the space is made of cubes, with 4 cubes around each edge...
A simple way to understand why there are only five regular polyhedra is to examine how reg...
A construction of 8 cubes that can't be the net of a hypercube in the 3-dimensional space....
How to transform a tetrahedron into an octahedron: we make some successive sections with 4...
La famiglia dei poliedri che si ottengono scegliendo un punto per ogni spigolo di un ottae...
A simple way to understand why there are only five regular polyhedra is to examine how reg...
Lo spezzamento di un cubo in un tetraedro regolare e 4 tetraedri, non regolari, con vertic...
A simple way to understand why there are only five regular polyhedra is to examine how reg...
