Alguns teoremas clássicos da geometria sintética e aplicações

Abstract

In this work, we tried to take a simple approach of some classical theorems of Euclidean Plane Geometry and make them better known, because although they have a great role in solving many geometrical problems, they are somehow forgotten both in primary and in undergraduate education. In order to redeem such theorems, therefore developing the people skills in Geometry, we explored the following Theorems: Stewart, Menelaus, Ceva, Wallace-Simpson line, Ptolemy, Hipparchus, Napoleon, Miquel, Desargues, Pascal, Pappus and Feuerbach. For the proofs of the mentioned theorems, we use some results of Plane Geometry and Inversive Geometry. We believe that both approach the making of this work, with the use of Inversive Geometry, for instance, as the classical theorems which we used only elementary methods of Synthetic Geometry, can serve to improve the teaching and learning of Euclidean Plane Geometry and possibly serve as the motivating element for students and teachers seeking to improve their knowledge in Geometry in its various ramifications.