The book is addressed to both those who have studied and love geometry, as well as to those who discover it now, through study and training, in order to obtain

Also, we introduce the notion of Orthohomological Triangles, which means two triangles that are simultaneously orthological and homological.

This book contains 21 papers of plane geometry. It deals with various topics, such as: quasi-isogonal cevians, nedians, polar of a point with respect to a circl

In a previous paper we have introduced the ortho-homological triangles, which are triangles that are orthological and homological simultaneously.