Book List on Non-Euclidean Geometry: From theTreasureTroves collection.Euclidean and Non-Euclidean Geometry with The Geometer's Sketchpad: Conference talk by Scott Steketee with downloadable sketches.Minkowskian geometry and quaternion algebras: An exploration of the geometry of quaternion algebra, including a commutative variant which exhibits the properties of Minkowskian geometry.Non-Euclidean Geometry: A historical account with links to biographies of some of the people involved.Non-Euclidean Geometry - Mathematics and the Liberal Arts: A resource for student research projects and for teachers interested in using the history of mathematics in their courses.Non-Euclidean Geometry with LOGO: Review of a new version of LOGO developed at Cardiff.NonEuclid - Hyperbolic Geometry Article + Software Applet: NonEuclid is a software simulation offering straightedge and compass constructions in hyperbolic geometry.References for Non-Euclidean Geometry: A bibliographic reference list of books and articles on non-Euclidean geometries, part of the MacTutor History of Mathematics archive.Seminar on the History of Hyperbolic Geometry: Seminar notes by Greg Schreiber.Spherical Trigonometry, Arc Distance Formula: Finding the shortest distance between two points on the earth given latitude and longitude. Download ARC_CALC_3, Microsoft Excel version, A Spherical Triangle Calculator by James Q. Jacobs.The Ontology and Cosmology of Non-Euclidean Geometry: A philosophical essay.