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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.
http://mathforum.org/powgrepform.html Archimedes' Book of Lemmas -
A collection of all 15 propositions from Archimedes' Book of Lemmas with complete proofs, each accompanied by a Java illustration.
http://www.cut-the-knot.org/Curriculum/Geometry/BookOfLemmas/index.shtml 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.
http://www.cut-the-knot.com/geometry.html A New Way to Calculate a Triangle's Area -
Using the length of the three sides. The proof is better understood than the old one.
http://hometown.aol.com/tienchien/myhomepage/find_triangle_area.html Packomania -
Includes packings of equal objects in containers together with source codes to obtain them numerically.
http://hydra.nat.uni-magdeburg.de/packing/packing.html NPR : 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] <small>(March 13, 2005)</small>
http://www.npr.org/templates/story/story.php?storyId=4531695 Fundamentals 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.
http://polly.phys.msu.ru/~belyaev/geometry.htm Steiner Surfaces -
Mathematical descriptions and ray-traced images of various types of Steiner surfaces.
http://www.ipfw.edu/math/Coffman/steinersurface.html GLaD Comments -
A new type of geometric construction that was discovered by Dan Litchfield and David Goldenheim. Includes general explanation and sketch examples.
http://jwilson.coe.uga.edu/Texts.Folder/GLaD/GLaD.Comments.html Math Forum: Geometry.research -
Discussion board for geometry professors and instructors to keep informed of the latest research.
http://mathforum.org/kb/forum.jspa?forumID=130 Cut the Knot -
Features articles about specific problems, illusions, and puzzles. Includes diagrams.
http://www.cut-the-knot.org/geometry.shtml 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.
http://xahlee.org/PageTwo_dir/more.html Conjectures Produced by the Program Graffiti -
Graffiti is a computer program that makes conjectures in mathematics and chemistry. Links to the conjectures and bibliography.
http://cms.dt.uh.edu/faculty/delavinae/research/wowref.htm Geometric Group Theory -
Information and resources about geometric group theory and low-dimensional topology. People, groups, meetings, links.
http://www.math.ucsb.edu/~jon.mccammond/geogrouptheory/ The Geometry Junkyard -
Usenet clippings, web pointers, lecture notes, research excerpts, papers, abstracts, programs, problems, and other stuff related to discrete and computational geometry.
http://www.ics.uci.edu/~eppstein/junkyard/ Cuboid and Cube Surface Distances -
A java applet with substantial analysis related to distances on a rectangular box.
http://www.btinternet.com/~se16/js/cuboid.htm The Lepidoptera of the Circles -
The Butterfly theorem and its generalizations illustrated by Java applets.
http://www.cut-the-knot.org/ctk/Lepidoptera.shtml Go 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.
http://www.gogeometry.com The Complete Quadrilateral -
Several properties of the complete quadrilateral illustrated with Java applets
http://www.cut-the-knot.org/ctk/CompleteQuadrilateral.shtml Geometry in Action -
Includes collections from various areas in which ideas from discrete and computational geometry meet real world applications.
http://www.ics.uci.edu/~eppstein/geom.html Bette Veteto's Homepage -
History of Mathematics, very strong on geometry.
http://www.people.memphis.edu/~brveteto/ Paul Bourke's Geometry Page -
Includes formulas, definitions and three dimensional image illustrations.
http://astronomy.swin.edu.au/~pbourke/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.
http://members.ozemail.com.au/~llan/ The Entropy Reduction Laboratory by Karl-Dietrich Neubert -
Discusses double shell structured periodic systems, platonic spheres, molecular and crystal structures, and FlashSort algorithms.
http://www.neubert.net/ 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.
http://www.geom.uiuc.edu/docs/doyle/mpls/handouts/handouts.html Math Forum: Search geometry-forum -
Those interested in examining the previous incarnation of the Math Forum may search the archives of the Geometry Forum.
http://mathforum.org/kb/forum.jspa?forumID=126 Geometry/Topology at Michigan State University -
Activities of the geometry/topology group at Michigan State University.
http://www.math.msu.edu/gt/ 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.
http://www.geom.uiuc.edu/ 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.
http://www.geocities.com/kiranisingh/center.html Erich's Packing Center -
Graphics and links for various packing, tiling and covering problems.
http://www.stetson.edu/~efriedma/packing.html Geometry Activities -
By Ephraim Fithian.
http://homepage.mac.com/efithian/geometry.html Tim Lister's Hyperbolic Geometry -
Cabri constructions for the demonstration of the basic concepts of hyperbolic geometry in the Poincare disc model.
http://mcs.open.ac.uk/tcl2/nonE/nonE.html Sangaku: Reflections on the Phenomenon -
Critical reflections on the sangaku phenomenon accompanied by a collection of solved sangaku problems, many with interactive Java illustrations.
http://www.cut-the-knot.org/pythagoras/Sangaku.shtml The Kepler Conjecture -
Information on the recent proof of Kepler conjecture on sphere packings.
http://www.math.pitt.edu/~thales/kepler98/ 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.
http://www.geom.uiuc.edu/docs/reference/CRC-formulas/ Wilson Stothers' Inversive Geometry and CabriJava Pages -
Includes Steiner's Porism and the arbelos.
http://www.maths.gla.ac.uk/~wilson/cabripages/inversive/inversive0.html 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.
http://agutie.homestead.com/ Math 3210 - Higher Geometry I -
Course notes by Bill Cherowitzo.
http://www-math.cudenver.edu/~wcherowi/courses/m3210/m3210.html Mathematical Curves and Surfaces -
Graphical representations of computer generated forms. (French/English).
http://pagesperso-orange.fr/roger.assouly/ A Gallery of Interactive On-Line Geometry -
At the Geometry Center.
http://www.geom.uiuc.edu/apps/gallery.html Polyedergarten -
Shows paper models of polyhedra.
http://www.polyedergarten.de 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'.
http://www.cut-the-knot.com/triangle/Morley/index.html Encyclopedia of Triangle Centers -
By Clark Kimberling. Over 1000 triangle centres in a searchable compilation with diagrams.
http://faculty.evansville.edu/ck6/encyclopedia/
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