A regular tetrahedron. You can reconstruct it between the mirrors of the corresponding kal...
A regular tetrahedron with double side than this one. You can see in a net how many triang...
One of the five regular polyhedra, the tetrahedron, reconstructed in the corresponding kal...
Con quattro tetraedri regolari di lato 1 e un ottaedro regolare di lato 1 si può costruir...
A regular tetrahedron (blue) and a tetrahedron with the same volume (yellow).
A regular tetrahedron, made of 4 triangles. You can see a net. How many triangles do we ne...
The green straw, laid between the two mirrors that form an angle of 90°, shows the 3 rota...
