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Junior Balkan MO
2001 Junior Balkan MO
4
4
Part of
2001 Junior Balkan MO
Problems
(1)
1415 vertices
Source: 5th JBMO JBkMO 2001, problem 4
6/11/2004
Let
N
N
N
be a convex polygon with 1415 vertices and perimeter 2001. Prove that we can find 3 vertices of
N
N
N
which form a triangle of area smaller than 1.
geometry
perimeter
trigonometry
combinatorics solved
combinatorics