Excerpt from A Key to the Exercises and Examples Contained in a Text-Book of Euclid's Elements: Books I-Vi, and XI The Key is arranged for use with the Edition of our Euclid bearing the date 1892. For the convenience of those who use an earlier Edition, we here give a list of the few alterations which on careful revision we have thought well to make in the Examples of the book. On Page 148 (euclid), Ex. 40, read, Produce a given straight line so that the rectangle contained by the whole line thus produced and the part produced, may be equal to the square on whether given line. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.