Assertion: polyhedron's polygon | /r/HasAspect | n sides
Facets:
Source sentences:
text: A convex regular polygon having n sides is denoted by { n }.
text: In the case of a tetrahedron, the polygons are all triangles by default, because in order to create a three-dimensional object with four polygons, each polygon must have three sides to connect with the other three polygons.