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A subdivision of the sphere into 120 spherical triangles with angles 36°, 60°, 90°. Exh...
A subdivision of the sphere into 120 spherical triangles with angles 36°, 60°, 90°. Exh...
A subdivision of the sphere into 120 spherical triangles with angles 36°, 60°, 90°. Exh...
The green straw, laid between the two mirrors that form an angle of 90°, shows the 3 rota...
Some strange shapes with tetrahedral symmetry on the sea-front in Crete.
At the Haus Noldin in Salorno (Bolzano) we can see a strange lamp composed by 7 squares, 1...
This street-lamp has a symmetry of type D3, the same symmetry of a pyramid with an equilat...
An octagonal bell-tower and a house decorated in Giessen (Austria).
The fountain in piazza S.Babila, in Milan, has a symmetry of type D4, the same symmetry of...
The 5 regular polyhedra in wood. From a collection of solids ordered by the engineer Felic...
