Assertion: polyhedron's edge | /r/HasProperty | shared by exactly two polygons
Facets:
Source sentences:
text: That is, each edge should be shared by exactly two polygons, and the link of each vertex should be a single cycle that alternates between the edges and polygons that meet at that vertex.
text: You may find the definitions here helpful, as well: Glossary - George W. Hart http://www.georgehart.com/virtual-polyhedra/glossary.html polyhedron - A three dimensional object bounded by polygons, with each edge shared by exactly two polygons.