A dodecahedron

A regular dodecahedron. You can see a net.Image has been used in the posters on polyhedra ...

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A cube

A cube. You can reconstruct it between the mirrors of the corresponding kaleidoscope. This...

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Un esagono

Possiamo decidere che due poligoni hanno la stessa forma quando è possibile trascinare i ...

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Un pentagono

Possiamo decidere che due poligoni hanno la stessa forma quando è possibile trascinare i ...

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Il ritmo delle forme - The...

The preparation of the exhibition Il ritmo delle forme - The rhythm of the shapes in Genoa...

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A rose window D3

This rosette in the apse of the Duomo of Milan has dihedral symmetry of type D3.

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The kaleidoscope effect

If we put any object between two incident mirrors at angle that divides 180° (90° in the...

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The kaleidoscope effect

If we put any object between two incident mirrors at angle that divides 180° (60° in the...

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The kaleidoscope effect

If we put any object between two incident mirrors at angle that divides 180° (30° in the...

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Planes of symmetry of a cube

A cube has nine symmetry planes: three planes which are parallel to a couple of opposite ...

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