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A dodecahedron.Image appeared in the survey "Officina della matematica" in the number 1 of...
The roof of a skylight in Sondrio, at the galleria Campello.
Una delle possibili strategie per disegnare una superficie, come qui una ciambella a tre b...
You can get persuaded of the the fact that convexity is unimportant for the validity of Eu...
Two mirrors angled in a particular way highlight the axes of rotation of a cube. Here two ...
A simple way to understand why there are only five regular polyhedra is to examine how reg...
The rhombic triacontahedron can be coloured with five colours so that, around the vertices...
A raffronto uno sviluppo del cubo (in cui sono in evidenza, colorati allo stesso modo, gli...
