Book:Joan Gómez Urgellés/When Straight Lines become Curves

National Geographic "Our Mathematical World" series: $4$

Contents

 * Preface


 * Chapter 1. A Taxi Ride


 * Chapter 2. Euclidean Geometry


 * Chapter 3. Competing with Euclid


 * Chapter 4. The Establishment of Non-Euclidean Geometry


 * Chapter 5. The Surprising Results of Hyperbolic Geometry


 * Chapter 6. Contributions to Elliptical Geometry


 * Chapter 7. Geometry of the Earth


 * Chapter 8. Geometry in the $21$st Century


 * Appendix: The Theory of Relativity and the New Geometries


 * Bibliography


 * Index