In geometry, the tridiminished rhombicosidodecahedron is one of the Johnson solids (). It can be constructed as a rhombicosidodecahedron with three pentagonal cupolae removed. Related Johnson solids are: : diminished rhombicosidodecahedron with one cupola removed, : parabidiminished rhombicosidodecahedron with two opposing cupolae removed, and : metabidiminished rhombicosidodecahedron with two non-opposing cupolae removed. External links Johnson solids