by H. S. M. Coxeter (Author)
This textbook introduces non-Euclidean geometry, and the third edition adds a new chapter, including a description of the two families of 'mid-lines' between two given lines and an elementary derivation of the basic formulae of spherical trigonometry and hyperbolic trigonometry, and other new material.
Number of Pages: 326
Dimensions: 0.73 x 9 x 6 IN
Publication Date: December 15, 1965