A tiling of the sphere with 24 spherical triangles with angles 60°, 60°, 90°. The great...
Si ottiene una stella octangula unendo due tetraedri regolari disposti in modo tale che gl...
The green straw, laid between the two mirrors that form an angle of 90°, shows the 3 rota...
The blue straw, laid between the mirrors that form an angle of 60°, shows the 4 rotation ...
Some strange shapes with tetrahedral symmetry on the sea-front in Crete.
A bicoloured stella octangula in the kaleidoscope of the tetrahedron: the symmetry group o...
Mirrors tricks in the kaleidoscope of the tetrahedron. Even if we put a small prism in the...
A regular tetrahedron with the tracks of its planes of symmetry and the same tracks on a s...
A regular tetrahedron and a uniform polyhedron of type (3,6,6). The image appears in the b...
The triangular hole inside the kaleidoscope, reflected in the mirrors, creates the virtual...
