Reprint of the original, first published in 1872.

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Excerpt from Key to Bradbury's Elementary Geometry and Trigonometry All the divisors of 360, not less than 60, are 60, 72, 90, 120, 180, and 360; of which only 60, 90, and 120 can be the number of degrees in an angle of a regular polygon. These numbers represent the number of degrees in each angle of an equilateral triangle, a square, and an equilateral hexagon respectively. 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.

Excerpt from Key to Bradbury's Elementary Geometry and Trigonometry 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.

Reprint of the original, first published in 1872.