Cube and octahedron

Cubes and octahedra are dual polyhedra. The centres of the faces of an octahedron are vert...

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Dodecahedron and icosahedron

Dodecahedron and icosahedron are dual polyhedra: the centres of the faces of a icosahedron...

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A (4,6,6)

This drawing, attributed to Leonardo da Vinci and taken from the plates of Luca Pacioli's ...

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Una facciata non piana

Il Palazzo dell'Orologio, in piazza dei Cavalieri, a Pisa, con la sua facciata non piana, ...

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Curve

Una scultura a Bolzano, vicino alla stazione.

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La teca delle ombre

Una teca con una luce in alto, un ripiano per degli oggetti, e un'anta che permette di nas...

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Cubi

A Stresa, all'ingresso di una villa, due cubi in posizione "anomala". Si può vederne un'a...

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Un tronco

La geometria dei disegni su un tronco.

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A baloon

Two baloons: the structure of the one in the foreground recalls the subdivision of the sph...

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A regular tetrahedron

A regular tetrahedron, made of 4 triangles. You can see a net. How many triangles do we ne...

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