Assertion: polyhedron's edge | /r/CapableOf | cross at vertex
Facets:
Source sentences:
text: Although there are other ways of seeing that the graphs of convex 3-dimensional polyhedra or graphs on the sphere have planar graphs (i.e. at some stage use stereographic projection), this argument hopefully makes clear that the graphs that can be drawn on a sphere (polyhedra whose graphs are homeomorphic to a sphere) where edges meet only at vertices are the same as the graphs that can be drawn in a plane where edges cross only at vertices.