MathDB
Problems
Contests
National and Regional Contests
PEN Problems
PEN R Problems
11
R 11
R 11
Source:
May 25, 2007
geometry
parallelogram
The Geometry of Numbers
Problem Statement
Prove that if a lattice parallelogram contains at most three lattice points in addition to its vertices, then those are on one of the diagonals.
Back to Problems
View on AoPS