A regular icosahedron. You can reconstruct it in the mirrors of the kaleidoscope corresponding to the symmetry group of a dodecahedron. This picture has been used for the posters on polyhedra for the exhibition Simmetria, giochi di specchi - Symmetry, playing with mirrors.
elaborazione grafica di Roberta Granà
The image belongs to the sections...:
From "towards the 4th dimension" (From "XlaTangente")
Icosahedron (3D geometry)
The symmetry group of the dodecahedron (*532) (Symmetry)
Posters about polyhedra (From the exhibitions of matematita)