Assertion: polyhedron's polygon | /r/HasProperty | convex and for n ≥ 5star
Facets:
Source sentences:
text: Dimensions two, three and four include regular figures which have fivefold symmetries and some of which are non-convex stars, and in two dimensions there are infinitely many regular polygons of n-fold symmetry, both convex and (for n ≥ 5) star.