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The planes that we need to cut out a dodecahedron from a sphere.
The planes that we need to cut out a regular icosahedron (the figure in red in the centre)...
Regular polyhedra.Exhibit of Un tuffo nella quarta dimensione - Diving in the 4th dimensio...
How to transform a tetrahedron into an octahedron: we make some successive sections with 4...
Cube and octahedron are dual polyhedra: in this position the edges of the cube are perpend...
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).
