divide 21-gon into 2022 triangles , no 3 vetrices are collinear
Source: 2022 Chile National Olympiad level 2 p5, level 1 p6
October 22, 2022
combinatoricscombinatorial geometry
Problem Statement
Is it possible to divide a polygon with sides into triangles in such a way that among all the vertices there are not three collinear?