Hyperbolic geometry is a type of non-Euclidean geometry that differs from classical Euclidean geometry in its treatment of parallel lines. In Euclidean geometry, parallel lines are equidistant and will never meet. In hyperbolic geometry, parallel lines can get arbitrarily close but will never intersect. Hyperbolic geometry is characterized by a constant negative curvature, meaning that lines curve away from each other, and objects in hyperbolic space appear to be "slimmer" than in Euclidean space. This leads to counterintuitive results, such as the fact that in hyperbolic geometry, there are more parallel lines to a given line through a point than there are in Euclidean geometry. Hyperbolic geometry has important applications in many areas of mathematics, including number theory, cryptography, and the study of Riemann surfaces. It is also used in physics to model the behavior of certain physical systems, such as the geometry of space-time in general relativity.
