In geometry, the truncated order-4 pentagonal tiling is a uniform tiling of the hyperbolic plane.
A half symmetry [1+,4,5] = [5,5] coloring can be constructed with two colors of decagons.
This coloring is called a truncated pentapentagonal tiling.
There is only one subgroup of [5,5], [5,5]+, removing all the mirrors.
This hyperbolic geometry-related article is a stub.