Spherical triangles into which a sphere is divided by the planes of symmetry of a uniform polyhedron.
Möbius Triangles
See also
Spherical Triangle, Uniform PolyhedronExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Möbius Triangles." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/MoebiusTriangles.html