It consists of twelve pentagons, twenty vertexes and thirty edges, and every dihedral angle is 116.565 . Let us fill the ball with dodecahedra. It is not easy for us to image building such blocks without any gap. But in the Hyperbolic NonEuclidean World it is possible. By using this dodecahedron, you can make 3-D tiling.
Every edge is surrounded by five dodecahedra.
Needless to say, you need infinite number of dodecahedra to fill the Ball fully. If you make a dodecahedron with 90 dihedral angle, four dodecahedra have a common edge. Such dodecahedron is called a right-angled dodecahedron . If 60 dihedral angle, six dodecahedra have a common edge. Thanks to Sascha Rogmann in Germany, I could make these pictures.