a line intersecting a square lattice
Source: 2021 Dürer Math Competition Finals Day2 E3 https://artofproblemsolving.com/community/c2749870_
January 9, 2022
areasgeometry
Problem Statement
The figure shows a line intersecting a square lattice. The area of some arising quadrilaterals are also indicated. What is the area of the region with the question mark?
https://cdn.artofproblemsolving.com/attachments/0/d/4d5741a63d052e3f6971f87e60ca7df7302fb0.png