Sweet hexagons
Source: European mathematical cup 2017
January 3, 2018
combinatorics
Problem Statement
A regular hexagon in the plane is called sweet if its area is equal to . Is it possible to place sweet hexagons in the plane such that the union of their interiors is a convex polygon of area at least ?Remark: A subset of the plane is called convex if for every pair of points in , every point on the straight line segment that joins the pair of points also belongs to . The hexagons may overlap.