Part of the
Atlas of Small Regular Polytopes
Polytopes of Type {2,18,20}
See
other polytopes
of rank 4
Polytopes of this Type
2 in this atlas
{2,18,20}*1440a
·SmallGroup(1440,1584) · universal
{2,18,20}*1440b
·SmallGroup(1440,4569) · universal