Principles of Geometry

ISBN: 9781330400951 出版年：2016 页码：204 H F Baker Forgotten Books

Erratum. In Ex. 9, p. 175, instead of by taking three positions of P upon p, read in general, by taking three positions of P upon the real line p through the intersection of the two given lines, so chosen that the corresponding points U, V, W are in line.