+The Poincare Disk is a beautiful [model](/wiki/Geometric_Model) of 2D [Hyperbolic Geometry](/wiki/Hyperbolic_Geometry), where the entire infinite hyperbolic plane gracefully resides within an open Euclidean disk. Within this fascinating space, "straight lines" are represented by circular arcs that meet the disk's boundary at right angles, or by diameters.
+## See also
+- [Hyperbolic Geometry](/wiki/Hyperbolic_Geometry)
+- [Non-Euclidean Geometry](/wiki/Non-Euclidean_Geometry)
+- [Poincare Half-Plane](/wiki/Poincare_Half-Plane)
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