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A cube has nine symmetry planes: three planes which are parallel to a couple of opposite ...
A grid of plane triangles: if we imagine to elongate the grid to infinity, the grid repres...
A subdivision of the sphere into 24 spherical triangles with angles 60°, 60°, 90°. Exhi...
This Portuguese tapestry is an example of all the seven symmetry types in a frieze. From ...
This frieze of type 22∞ was created by using a fish motif, by folding and cutting a stri...
If we put inside the hole a square with two copies of the same drawing, that can be rotate...
A small construction that reproduces a small stellated dodecahedron in the kaleidoscope of...
Two mirrors at a particular angle show the rotation axes of the cube: here we see two mirr...
Two mirrors at a particular angle show the rotation axes of the cube: here we see two mirr...
A poster of the exhibition Simetria, jogos de espelhos, realized in Porto in 2002 by the P...
