We approach several themes of classical geometry of the circle and complete them with some original results, showing that not everything in traditional math is

In this article, we review some properties of the harmonic quadrilateral related to triangle simedians and to Apollonius’s Circle.

In this article, we define the Lucas’s inner circles and we highlight some of their properties.

In this article, we emphasize the radical axis of the Lemoine’s circles.

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