Hyperbolic Geometry

Definitions in Hyperbolic Geometry

"1. A straight line segment can be drawn joining any two points.

2. Any straight line segment can be extended indefinitely in a straight line."

"In hyperbolic geometry, a hyperbolic triangle is a triangle in the hyperbolic plane. It consists of three line segments called sides or edges and three points called angles or vertices."

If there is a line and a point not on the line, then there is exactly one line through the point perpendicular to the given line.

http://mathworld.wolfram.com/EuclidsPostulates.html

"Euclid's Postulates." -- from Wolfram MathWorld. N.p., n.d. Web. 13 May 2015.

"Hyperbolic Triangle." - Wikipedia, the Free Encyclopedia. N.p., n.d. Web. 13 May 2015.

(n.d.): n. pag. Web.http://pages.towson.edu/gsarhang/module%20for%20hyperbolic%20geometry.doc