A hyperbolic version of the Euclidean icosahedron.
Hyperbolic Icosahedron
See also
Hyperbolic Cube, Hyperbolic Dodecahedron, Hyperbolic Octahedron, Hyperbolic Polyhedron, Hyperbolic TetrahedronExplore with Wolfram|Alpha
References
Trott, M. "The Cover Image: Hyperbolic Platonic Bodies." §8.3.10 in The Mathematica GuideBook for Graphics. New York: Springer-Verlag, 2004. http://www.mathematicaguidebooks.org/.Referenced on Wolfram|Alpha
Hyperbolic IcosahedronCite this as:
Weisstein, Eric W. "Hyperbolic Icosahedron." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/HyperbolicIcosahedron.html