A sphere with the track of the planes of symmetry of the regular tetrahedron on its surfac...
One of the five regular polyhedra, the octahedron, reconstructed, in two colours, in the k...
The stella octangula is made of two tetrahedra that are disposed in such a way that their ...
A regular tetrahedron. You can reconstruct it between the mirrors of the corresponding kal...
A uniform polyhedron of type (3,6,6): around each vertex there are an equilateral triangle...
The green straw, laid between the two mirrors that form an angle of 90°, shows the 3 rota...
Some strange shapes with tetrahedral symmetry on the sea-front in Crete.
The picture shows what happens when you put just one ball in the kaleidoscope of the tetra...
One of the five regular polyhedra, the tetrahedron, reconstructed in the corresponding kal...
One of the five regular polyhedra, the cube, reconstructed, in two colours, in the kaleido...
