Assertion: polyhedron's polygon | /r/HasAspect | regular form
Facets:
Source sentences:
text: Every polygon has a regular form which is geometrically self-dual about its intersphere: all angles are congruent, as are all edges, so under duality these congruences swap.
text: Every polygon has a regular form which is geometrically self-dual about its intersphere: all angles are congruent, as are all edges, so under duality these congruences swap.