Two Triangles with the Same Orthocenter and a Vectorial Proof of Stevanovic's Theorem

Abstract

In this article we'll emphasize on two triangles and provide a vectorial proof of the fact that these triangles have the same orthocenter. This proof will further allow us to develop a vectorial proof of the Stevanovic's theorem relative to the orthocenter of the Fuhrmann's triangle.

5 pages, 2 geometrical figures