Bundeswettbewerb Mathematik 1974 Problem 1.2
Source: Bundeswettbewerb Mathematik 1974 Round 1
October 12, 2022
geometryareapolygonsquare
Problem Statement
Seven polygons of area lie in the interior of a square with side length . Show that there are two of these polygons whose intersection has an area of at least 1\slash 7.