Education 4
Events 49
For Kids 19
Open Problems 5
People 37
Publications 15
Research Groups 9
Software 27
Algebraic Geometry 109
Computational Geometry 61
Differential Geometry 25
Non-Euclidean 11
Projective 8
Higher Dimensional 9
Plane Geometry 5
Polytopes 58
Sculpture and Art 16
Solid Geometry 2
Topology 6
| | Trigonometry - Math, School Time, Kids and Teens 11
Geometric Algebra - Algebra, Math, Science 10
Specific Numbers - Recreations, Math, Science 192
 Archimedes' Book of LemmasArchimedes' Book of Lemmas
 A collection of all 15 propositions from Archimedes' Book of Lemmas with complete proofs, each accompanied by a Java illustration.
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Bette Veteto's HomepageBette Veteto's Homepage
 History of Mathematics, very strong on geometry.
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Bob's PagesBob'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.
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Center of Points in 2- or Higher-dimensional SpaceCenter 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.
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The Complete QuadrilateralThe Complete Quadrilateral
 Several properties of the complete quadrilateral illustrated with Java applets
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Conjectures Produced by the Program GraffitiConjectures Produced by the Program Graffiti
 Graffiti is a computer program that makes conjectures in mathematics and chemistry. Links to the conjectures and bibliography.
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Cuboid and Cube Surface DistancesCuboid and Cube Surface Distances
 A java applet with substantial analysis related to distances on a rectangular box.
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Cut the KnotCut the Knot
 Features articles about specific problems, illusions, and puzzles. Includes diagrams.
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Encyclopedia of Triangle CentersEncyclopedia of Triangle Centers
 By Clark Kimberling. Over 1000 triangle centres in a searchable compilation with diagrams.
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The Entropy Reduction Laboratory by Karl-Dietrich NeubertThe Entropy Reduction Laboratory by Karl-Dietrich Neubert
 Discusses double shell structured periodic systems, platonic spheres, molecular and crystal structures, and FlashSort algorithms.
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Erich's Packing CenterErich's Packing Center
 Graphics and links for various packing, tiling and covering problems.
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Fundamentals of GeometryFundamentals of Geometry
 Free online book on geometry in pdf format. Contains material not easily found elsewhere from detailed exposition of elementary absolute geometry based on Hilbert's axioms to more advanced topics.
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A Gallery of Interactive On-Line GeometryA Gallery of Interactive On-Line Geometry
 At the Geometry Center.
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Geometric Group TheoryGeometric Group Theory
 Information and resources about geometric group theory and low-dimensional topology. People, groups, meetings, links.
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Geometry ActivitiesGeometry Activities
 By Ephraim Fithian.
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Geometry and the Imagination in MinneapolisGeometry 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.
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Geometry CenterGeometry 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.
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Geometry Formulas and FactsGeometry Formulas and Facts
 Excerpts from the 30th Edition of the CRC Standard Mathematical Tables and Formulas (1995), namely, the geometry section minus differential geometry.
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Geometry from the Land of the IncasGeometry 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.
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Geometry in ActionGeometry in Action
 Includes collections from various areas in which ideas from discrete and computational geometry meet real world applications.
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The Geometry JunkyardThe Geometry Junkyard
 Usenet clippings, web pointers, lecture notes, research excerpts, papers, abstracts, programs, problems, and other stuff related to discrete and computational geometry.
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Geometry Page from Interactive Mathematics MiscellanyGeometry Page from Interactive Mathematics Miscellany
 Includes articles on topics in elementary and not so elementary geometry, many with interactive Java illustrations and multiple proofs.
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Geometry/Topology at Michigan State UniversityGeometry/Topology at Michigan State University
 Activities of the geometry/topology group at Michigan State University.
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GLaD CommentsGLaD Comments
 A new type of geometric construction that was discovered by Dan Litchfield and David Goldenheim. Includes general explanation and sketch examples.
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Go GeometryGo Geometry
 Offers a variety of resources for teaching and learning about geometry. Problems and theorems are presented with step-by-step solutions for each proof.
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The Kepler ConjectureThe Kepler Conjecture
 Information on the recent proof of Kepler conjecture on sphere packings.
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The Lepidoptera of the CirclesThe Lepidoptera of the Circles
 The Butterfly theorem and its generalizations illustrated by Java applets.
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Math 3210 - Higher Geometry IMath 3210 - Higher Geometry I
 Course notes by Bill Cherowitzo.
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Math Forum: Geometry POW/POM SearchMath 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.
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Math Forum: Geometry.researchMath Forum: Geometry.research
 Discussion board for geometry professors and instructors to keep informed of the latest research.
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Math Forum: Search geometry-forumMath Forum: Search geometry-forum
 Those interested in examining the previous incarnation of the Math Forum may search the archives of the Geometry Forum.
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Mathematical Curves and SurfacesMathematical Curves and Surfaces
 Graphical representations of computer generated forms. (French/English).
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Morley's MiracleMorley'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'.
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New Mathematical Findings by Secondary StudentsNew Mathematical Findings by Secondary Students
 High school students solve complex geometric problems by using GLad Sketchpad. Page includes diagrams.
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A New Way to Calculate a Triangle's AreaA New Way to Calculate a Triangle's Area
 Using the length of the three sides. The proof is better understood than the old one.
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PackomaniaPackomania
 Includes packings of equal objects in containers together with source codes to obtain them numerically.
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Paul Bourke's Geometry PagePaul Bourke's Geometry Page
 Includes formulas, definitions and three dimensional image illustrations.
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PolyedergartenPolyedergarten
 Shows paper models of polyhedra.
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Problem of the Minimum Rotation SurfaceProblem of the Minimum Rotation Surface
 Java applet demonstrating the catenary.
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Sangaku: Reflections on the PhenomenonSangaku: Reflections on the Phenomenon
 Critical reflections on the sangaku phenomenon accompanied by a collection of solved sangaku problems, many with interactive Java illustrations.
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Steiner SurfacesSteiner Surfaces
 Mathematical descriptions and ray-traced images of various types of Steiner surfaces.
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Tim Lister's Hyperbolic GeometryTim Lister's Hyperbolic Geometry
 Cabri constructions for the demonstration of the basic concepts of hyperbolic geometry in the Poincare disc model.
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Wilson Stothers' Inversive Geometry and CabriJava PagesWilson Stothers' Inversive Geometry and CabriJava Pages
 Includes Steiner's Porism and the arbelos.
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Xah's Personal PageXah'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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NPR : Mathematicians Get Crafty with GeometryNPR : Mathematicians Get Crafty with Geometry
 A husband and wife from Cornell University have come up with a crafty way to illustrate high-level geometry concepts -- by manipulating yarn into models that help explain the curvature of spaces. The mathemeticians talk with NPR's Jacki Lyden about hyperbolic crocheting. [4:47 streaming audio broadcast] (March 13, 2005)
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