An icosahedron
The marks on the surface of this icosahedron represent the planes of symmetry.
Image used in the posters on polyhedra realized for the exhibition Simmetria, giochi di specchi - Symmetry, playing with mirrors.
© matematita
elaborazione grafica di Roberta GranĂ
The image belongs to the sections...:
Icosahedron (3D geometry)
The symmetry group of the dodecahedron (*532) (Symmetry)
Posters about polyhedra (From the exhibitions of matematita)
Further information:
http://specchi.mat.unimi.it