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Lesson 8: Hyperbolic Geometry - Parallel Lines Not Having a Common Perpendicular

This lesson covers the case of parallel lines not having a common perpendicular in the context of hyperbolic geometry. References Beltrami–Klein model, Wikipedia, https://en.wiktionary.org/wiki/hyperb... Wolfe, H., Introduction to Non-Euclidean Geometry*, The Dryden Press, 1945. https://archive.org/details/in.ernet.... Gans, D., An introduction to Non-Euclidean Geometry*, Academic Press, 1973. https://archive.org/details/introduct...