- A Gallery of Interactive On-Line Geometry
At the Geometry Center.
- Allexperts Geometry Q&A
Volunteer tutors help you work through your geometry problems for free.
- ArXiv Front: MG Metric Geometry
Metric geometry section of the mathematics e-print arXiv.
- ArXiv Front: SG Symplectic Geometry
Symplectic geometry section of the mathematics e-print arXiv.
- Bette Veteto's Homepage
History of Mathematics, very strong on geometry.
- Bob's Pages
A collection of interactive geometry applets. Topics include polyhedra, Poncelet's porism, Soddy's hexlet, Mandelbrot set, Steiner porism, Pappus's chain, Repulsion polyhedra and stereo pictures.
- Center of Points in 2- or Higher-dimensional Space
It provides important formulations for finding a center of points in 2 or higher dimensional space. It can be used in drawing delauney triagulation and voronoi diagram in two or higher dimensions. It also describes how many points are required in defining a center in n-dimensional space.
- Conjectures Produced by the Program Graffiti
Graffiti is a computer program that makes conjectures in mathematics and chemistry. Links to the conjectures and bibliography.
- Cuboid and Cube Surface Distances
A java applet with substantial analysis related to distances on a rectangular box.
- Diamond Theory
Plato tells how Socrates helped Meno's slave boy "remember" the geometry of a diamond. Twenty-four centuries later, this geometry has a new theorem.
- Encyclopedia of Triangle Centers
By Clark Kimberling. Over 1000 triangle centres in a searchable compilation with diagrams.
- Erich's Packing Center
Graphics and links for various packing, tiling and covering problems.
- Geometric Group Theory
Information and resources about geometric group theory and low-dimensional topology. People, groups, meetings, links.
- Geometry Activities
By Ephraim Fithian.
- Geometry and the Imagination in Minneapolis
Geometry exercises for a two-week summer workshop led by John Conway, Peter Doyle, Jane Gilman and Bill Thurston at the Geometry Center in Minneapolis, June 1991.
- Geometry Center
Web site for the (now closed) Center for the Computation and Visualization of Geometric Structures at the University of Minnesota. Graphics, multimedia, software, teaching resources.
- Geometry Formulas and Facts
Excerpts from the 30th Edition of the CRC Standard Mathematical Tables and Formulas (1995), namely, the geometry section minus differential geometry.
- Geometry from the Land of the Incas
Presents problems involving circles and triangles, with proofs, SAT practice quizzes and famous quotes. Also, has examples of geometry in Peruvian culture.
- Geometry in Action
Includes collections from various areas in which ideas from discrete and computational geometry meet real world applications.
- Geometry Page from Interactive Mathematics Miscellany
Includes articles on topics in elementary and not so elementary geometry, many with interactive Java illustrations and multiple proofs.
- GLaD: Introduction
A historical introduction to a new Euclidean construction by David Goldenheim and Daniel Litchfield. Dynamic Geometer's Sketchpad files are included.
- Intensified Geometry Curriculum Review
A comprehensive, illustrated review of concepts covered in an Intensified Geometry textbook/class.
- Math 3210 - Higher Geometry I
Course notes by Bill Cherowitzo.
- Math Forum: Geometry POW/POM Search
Search the Geometry Problem of the Week's archive of creative, non-routine challenges, as well as submissions and commentary, dating back to 1993.
- Math Forum: geometry-research
Geometry professors and instructors may keep informed of the latest research conducted in their field at the geometry-research discussion list.
- Math Forum: Search geometry-forum
Those interested in examining the previous incarnation of the Math Forum may search the archives of the Geometry Forum.
- Mathematical Curves and Surfaces
Graphical representations of computer generated forms. (French/English).
- Mathematical Surfaces
A collection of parametric and implicit equations.
- Menelaus' Theorem and its Applications
Theorems involving Menelaus' theorem and some applications of Menelaus' theorem to geometry problems.
- Morley's Miracle
A discussion of Morley's famous theorem and the research of which it was a tiny part. 5 proofs are given including J. Conway's, D. Newman's, and A. Connes'.
- Packomania
Includes packings of equal objects in containers together with source codes to obtain them numerically.
- Paul Bourke's Geometry Page
Includes formulas, definitions and three dimensional image illustrations.
- Problem of the Minimum Rotation Surface
Java applet demonstrating the catenary.
- Steiner Surfaces
Mathematical descriptions and ray-traced images of various types of Steiner surfaces
- The Educational Validity of Visual Geometry
Ph.D. thesis of Marius Blok (Hull, UK, 1998). 'Educational Geometry' is based on visual geometry, linked to philosophy and visual art and the learning is free of the application of formulae or the use of computations.
- The Entropy Reduction Laboratory by Karl-Dietrich Neubert
Discusses double shell structured periodic systems, platonic spheres, molecular and crystal structures, and FlashSort algorithms.
- The Geometry Junkyard
Usenet clippings, web pointers, lecture notes, research excerpts, papers, abstracts, programs, problems, and other stuff related to discrete and computational geometry.
- The Kepler Conjecture
Information on the recent proof of Kepler conjecture on sphere packings.
- Tim Lister's Hyperbolic Geometry
Cabri constructions for the demonstration of the basic concepts of hyperbolic geometry in the Poincare disc model.
- Trigonometric Delights
Full text of the book by Eli Maor. [PDF]
- Wilson Stothers' Inversive Geometry and CabriJava Pages
Includes Steiner's Porism and the arbelos.
- Xah's Personal Page
Features an illustrated dictionary of special plane curves, a paper on wallpaper groups, mathematics image gallery and links to software packages.
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