Excerpt from Archiv der Mathematik und Physik, 1871, Vol. 52: Mit Besonderer Rücksicht auf die Bedürfnisse der Lehrer an Höheren UnterrichtsanstaltenSehr einfacher Beweis des Satzes, dass die Mittel punkte der drei Diagonalen jedes vollständigen Vieredns in éin e r geraden Linie liegen. Von Herrn Matthew Collins. Mitgetheilt von dem Herausgeber II.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.