no of diagonals inside a 2009-gon, every diagonals cuts at most another
Source: Germany Federal - Bundeswettbewerb Mathematik 2009, round 2, p4
April 9, 2020
combinatorial geometrycombinatoricsdiagonals
Problem Statement
How many diagonals can you draw in a convex -gon if in the finished drawing, every drawn diagonal inside the -gon may cut at most another drawn diagonal?