New Update

Updated 22 MAR 2014 by Daniel Callahan

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"Euclid's 'Elements' Redux" is an open textbook on mathematical logic and geometry based on Euclid's "Elements" for use in grades 7-12 and in undergraduate college courses on proof writing. The current edition is based on John Casey's "The First Six Books of Euclid".

Many problem solvers throughout history wrestled with Euclid as part of their early education including Copernicus, Kepler, Galileo, Sir Isaac Newton, Abraham Lincoln, Bertrand Russell, and Albert Einstein. This edition is part of an effort to ensure that tomorrow's great thinkers will have that same privilege.

"Euclid's 'Elements' Redux" is a copyrighted work which is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License (the same license Wikipedia uses).

The current download of this document is Version 2014-081.



Revised Chapters 1-5

Added Student Answer Key for Chapters 1-4

To Do

Revise remaining chapters

Continue Answer Key