LEMAIRE, Méthodes de Résolution et Discussion des Problèmes de Géométrie, 1906

G. Lemaire, a professor at the École Hanley, is the author of this pedagogical work on solving geometry problems. This book, in its second edition, was intended for technical and secondary education. It presents systematic methods for approaching and solving geometry problems, with an emphasis on "discussion," i.e., the analysis of different possible solutions.