The marks on the surface of this regular dodecahedron represent the planes of symmetry. You can see the projection of these marks on a sphere.
Image used in the posters on polyhedra realized for the exhibition Simmetria, giochi di specchi - Symmetry, playing with mirrors.
elaborazione grafica di Roberta Granà
The image belongs to the sections...:
Dodecahedron (3D geometry)
The symmetry group of the dodecahedron (*532) (Symmetry)
Posters about polyhedra (From the exhibitions of matematita)