This book provides readers with a foundational understanding of the principles of Euclidean geometry. It includes the first six books of Euclid's Elements as well as propositions I-XXI of Book 11. This work, considered a major contribution to mathematics and geometric theory, would be of interest to anyone interested in the history of mathematics or looking to learn more about the foundations of geometry. It is written by Euclid.

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.