one 2013-gon constructed by diagonals of a regular 2013-gon,
Source: KJMO 2013 p8
May 1, 2019
combinatorial geometrycombinatoricsregular polygon
Problem Statement
Drawing all diagonals in a regular -gon, the regular -gon is divided into non-overlapping polygons. Prove that there exist exactly one -gon out of all such polygons.