Maximum-Area Small Polygons of Even Order
A small n-gon is a planar n-gon whose diameter is at most one. For odd n, Reinhardt proved that the regular polygon is optimal. For even n, the maximizer is nonregular, and only a few low orders were known exactly. We prove that for every even n>= 8 the maximum-area small n-gon is unique up to Euclidean isometry and re...