Prove that any convex polyhedron has three edges that can be used to form a triangle. (Barbu Bercanu, Romania)
Problem
Source: 2009 Oral Moscow Geometry Olympiad grades 10-11 p5
Tags: convex, geometry, polyhedron
Source: 2009 Oral Moscow Geometry Olympiad grades 10-11 p5
Tags: convex, geometry, polyhedron
Prove that any convex polyhedron has three edges that can be used to form a triangle. (Barbu Bercanu, Romania)