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Un edificio di forma strana (un prisma la cui base potrebbe essere un trapezio, o anche un...
There are not only prisms and pyramids! This (non-convex) polyhedron has 10 faces, all of ...
We can pick out 8 vertices among the 20 vertices of a dodecahedron so that they are the ve...
There are five ways to pick out 8 vertices among the 20 vertices of dodecahedron to form a...
There are five ways to pick out 8 vertices among the 20 vertices of dodecahedron to form a...
There are 5 ways to pick out 8 vertices among the 20 vertices of dodecahedron to form a cu...
A rather unusual dice, shaped like a regular icosahedron, with 20 faces.
The rotation axis of order 3 which goes through two opposite vertices of the cube. See ano...
The only regular tessellation of the space is made of cubes, with 4 cubes around each edge...
A simple way to understand why there are only five regular polyhedra is to examine how reg...
