Excerpt from MensurationIt presupposes an elementary knowledge of Geometry and Trigonometry, and for the sake of brevity, repetition of definitions and demonstrations given in these branches have been omitted, where a principle is used that has been established in either of these branches, the student is referred to one of them for the proof.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.