Ce livre est un manuel complet de géométrie élémentaire, conçu pour répondre aux exigences des programmes scolaires en vigueur en France en 1905. Il couvre les principes de la géométrie euclidienne plane, les propriétés des courbes usuelles et les techniques de démonstration géométrique. Écrit par Bolesias Alexandre Niewenglowski, cet ouvrage est un guide précieux pour tous les étudiants de mathématiques à l'époque. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.