MathDB
Isosceles triangles in regular polygon

Source: CWMO 2012 Q2

October 1, 2012
geometrygeometric transformationreflection

Problem Statement

Show that among any n≥3n\geq 3 vertices of a regular (2n−1)(2n-1)-gon we can find 33 of them forming an isosceles triangle.
Back to ProblemsView on AoPS