Three dodecahedra with an edge in common
When three dodecahedra are put around an edge, they won't fit because there will be a small hole between them (because the dihedral angle of a regular dodecahedron is smaller than 120°).
The image appears in the survey "Officina della matematica" of the double number 4-5 of the magazine XlaTangente.
© matematita
immagine di Gian Marco Todesco
The image belongs to the sections...:
Number 4-5 (From "XlaTangente")
Various matters (4D geometry)
Further information:
http://www.toonz.com/personal/todesco