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Euclidean and Non-Euclidean Geometry with The Geometer's Sketchpad
- Conference talk by Scott Steketee with downloadable sketches.
- Includes a set of supplementary notes that provide an introduction to Minkowskian geometry and a toolkit for constructing figures.
- A historical account with links to biographies of some of the people involved.
Non-Euclidean Implementation of LOGO
- Project to implement the well-known language LOGO for hyperbolic and elliptic geometry first, then for user-defined surfaces in differential geometry.
NonEuclid - Hyperbolic Geometry Article & Applet
- Software simulation offering straightedge and compass constructions in hyperbolic geometry.
The Ontology and Cosmology of Non-Euclidean Geometry
- A philosophical essay.
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.
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