 Geometry Basics  Jaime Garmendia III; Interactive Mathematics Online (IMO)
All the basics of geometry: Introduction; Angles and Lines; Conditionals, Unions, and Intersections; Measurement Formulas; Constructions; Greek Prefixes for polygons/polyhedra; Glossary; Sample problems; Stereograms: an Application of Geometry.
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 The Geometry Center  University of Minnesota
The Center for the Computation and Visualization of Geometric Structures: an NSF Science and Technology Research Center. The Center has a unified mathematics computing environment supporting math and computer science research, mathematical visualization,
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 geometrycollege  Math Forum
A discussion group accessible as a Webbased discussion, a mailing list, or a Usenet newsgroup, for discussions of topics covered in college geometry, problems appropriate for that level, and geometry education. Read and search archived messages; and
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 Geometry Daily  Tilman Zitzmann
A new "geometric minimal composition" every day since January, 2010. Zitzmann, an interaction and graphic designer, "draws simple shapes, combines them and experiments until they start to 'sing,'” then Photoshops them to have the look of "analog paper."
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 Geometry Discussion Groups  Math Forum
A gateway to the archives of the Math Forum's online electronic community comprising eight geometry discussion groups for all those interested in geometry. Access current news or follow a link to threaded past discussions to browse or search the archive
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 Geometry  Elmer G. Wiens; Egwald Web Services Ltd.
A collection of interactive geometric objects represented graphically including 3Dgraphics, space curves, trigonometric functions, hyperbolic functions, and
the trajectory of projectiles.
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 Geometry Expressions  Saltire Software
A software package that allows you to interact with geometric figures numerically and symbolically. Explore classroom activities and student projects made with this interactive geometry system; read back issues of The Journal of Symbolic Geometry; purchase
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 Geometry Formulas and Facts  Silvio Levy; The Geometry Center
Rewritten and updated excerpts from the 30th Edition of the CRC Standard Mathematical Tables and Formulas. Covers all of geometry, minus differential geometry. Very complete collection of definitions, formulas, tables and diagrams, divided into two and
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 Geometry Forum Articles  The Geometry Center
Articles on mathematical topics and about the Geometry Center by the Center's mathematics writers Evelyn Sander and Bob Hesse, originally posted on newsgroups hosted by the Geometry Forum (now the Math Forum). Articles are collected under the following
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 geometryforum  Math Forum
A discussion group accessible as a Webbased discussion, a mailing list, or a Usenet newsgroup. This was the main group for the Geometry Forum, the Math Forum's previous incarnation. Not currently used. Read and search archived messages.
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 Geometry Garret  Alan H. Schoen
A "potpourri of people, pictures, places, Penrose patterns, polyhedra, polyominoes, posters, posies, and puzzles," plus finite and infinite tilings by rhombs, rosettes and pseudorosettes, rombix, Kpatterns (images derived from partial sums of power
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 Geometry Glossary  Jaime Garmendia III; Interactive Mathematics Online (IMO)
Definitions of most of the words you'll need in geometry. Also some algebra and trig terms.
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 Geometry In Action  David Eppstein, Theory Group, ICS, UC Irvine
A collection of applications of computational geometry: areas in which ideas from discrete and computational geometry (meaning mainly lowdimensional Euclidean geometry) meet some real world applications, with brief descriptions of those applications
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 Geometry in Motion  Daniel Scher
Direct interaction with geometric diagrams, courtesy of JavaSketchpad. The contents include a variety of curvedrawing devices (Intersecting Circles, Falling Ladder, Van Schooten's Parabola, and more); also other activities such as Constant Perimeter
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 geometryinstitutes  Math Forum
A discussion group accessible as a Webbased discussion, a mailing list, or a Usenet newsgroup. Postings include planning for and information about geometry institutes held around the country. The Forum's teacher workshops hold discussions on this group
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 Geometry  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
More than 95 games or puzzles having to do with geometry, chaos, fractals, and topology with extensive discussions and solutions. Most require a browser capable of displaying JavaScript or Java.
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 The Geometry Junkyard  David Eppstein, Theory Group, ICS, Univ. of California at Irvine
A collection of usenet clippings, web pointers, lecture notes, research excerpts, papers, abstracts, programs, problems, and other stuff related to discrete and computational geometry  some serious and much also entertaining. Junk sorted into piles (Topics):
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 Geometry (MathPages)  Kevin Brown
"Informal notes" by Kevin Brown on geometry: constructing the heptadecagon, what mirrors do, the golden pentagon, the grazing goat and the lune, Napoleon's theorem, chess boards, Diophantine geodesic boxes, Zeno's mice and the logarithmic spiral, and
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 Geometry.Net
An online learning center offering extensive lists of links to sites with material in Basic Math; Pure and Applied Math; Computer & Internet; Technology; Biographers; Physics; Biology; and Sports.
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 Geometry of Fullerenes  Slavik Jablan, Mathematical Institute, Belgrade
Fullerenes (Buckminster Fuller) are considered from the points of view of geometry, graph theory and knot theory. Contents: Introduction; General fullerenes, graphs, symmetry and isomers; 5/6 fullerenes; Knot theory and fullerenes; "Perfect" fullerenes;
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 Geometry of Harmonic Maps  Y. L. Lin, Fudan University, Shanghai, China
A book which, though not a complete description of the theory, provides an introduction and an approach useful to researchers and graduate students in differential geometry, geometric analysis, differential equations and theoretical physics. Harmonic
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 Geometry of SelfContacting Binary Fractal Trees  Michael Frame; Union College, Schenectady, NY
Animations illustrating the constructions of binary fractal trees, with branch scaling chosen so some points of the left and right branches intersect, but only at the branch tips. The animations show how the geometry of the tree, and of the branch tips,
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 Geometry of the Sphere  John C. Polking, Rice University
This set of Web pages formed the text for part of the Advanced Mathematics course in the High School Teachers Program at the 1996 IAS/Park City Mathematics Institute. Material covered includes basic information about spheres, proof and consequences of
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 The Geometry of War, 15001750  Museum of the History of Science, Oxford
A virtual version of an exhibition from The Museum of the History of Science in Oxford on the uses of geometry in the art of warfare during the Renaissance. The site includes summaries that list the instruments and books in the exhibit and also provide
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 Geometry of War  Ivars Peterson (MathTrek)
Leonardo da Vinci was not alone in his fascination with military technology. The University of Oxford's Museum of the History of Science is now featuring a fascinating online exhibition called The Geometry of War, 15001750. The 81 illustrations, accompanied
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 Geometry Out of Africa  Ivars Peterson (MathTrek)
Two recent books that introduce African geometry. Geometry from Africa, by Paulus Gerdes, shows how one can discover or derive the Pythagorean theorem from African designs, explores the role of symmetry (with suggestions for home and classroom crafts
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 Geometry  Paul Bourke
Explorations and renderings of various surfaces and forms, including knots, surfaces, 3D shapes, curves, algorithms, tilings, plexagons, etc. Formulae for Quadrics (Surfaces of degree 2); Superellipse and superellipsoid; SuperToroid (3D); Plexagons; Hexagonal
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 Geometry Playground  Daniel J. Heath, Joshua Jacobs
Geometry Playground is a straightedge and compass construction tool for multiple geometries. The Java code is opensource, and the accompanying wiki includes handson discovery activities.
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 Geometry Playground  Exploratorium
An exhibit from San Francisco's Exploratorium. Peoplesized exhibits let you use your hands, brain, and body to play with physical demonstrations of geometry concepts. Exhibits fall under the categories of seeing, moving, and fitting things together,
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 geometrypuzzles  Math Forum
A discussion group accessible as a Webbased discussion, a mailing list, or a Usenet newsgroup, for interesting problems and conundrums that require only a knowledge of elementary geometry, and discussions of solutions. Read and search archived messages;
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 geometryresearch  Math Forum
A discussion group accessible as a Webbased discussion, a mailing list, or a Usenet newsgroup, for research announcements, seminars, reviews, and abstracts of papers and discussions of same, and ideas for research. Read and search archived messages;
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 geometrysoftwaredynamic  Math Forum
A discussion group accessible as a Webbased discussion, a mailing list, or a Usenet newsgroup. This group focuses on discussion of such geometry software programs as The Geometer's Sketchpad and Cabri Geometry II. Read and search archived messages; and
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 Geometry Then and Now  Jordana Wiener; Tufts University
Final paper for a Greek Science course at Tufts. Introduction: Although present day society is technically dimensions ahead of the ancient Greeks, we owe much of our progress to them. What is amazing is not so much that we are more scientifically advanced
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 Geometry Turned On: Dynamic Software in Learning, Teaching, and Research  J. King and D. Schattschneider, Editors
This book contains twentysix papers about aspects of dynamic software for geometry. The book does not contain software itself, but this site includes downloadable files for many of the papers in the book. For a discussion of what the book is about, see
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 Geometry Web Page  Ephraim Fithian; Kutztown University
Sixteen geometry activities: Tangrams; Golden Ratio; Geoboard; Polygons; Symmetry; Constructions; Polyominoes and Polyiamonds; Star Polygons; Special Points in Polygons; Polygon Tessellations; Kaleidoscope Tessellations; Escher Tessellations; Space Cubes;
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 Geomview: 3D Visualization Software  The Geometry Center
An interactive program written by the staff of the Geometry Center for viewing and manipulating geometric objects. It can be used as a standalone viewer for static objects or as a display engine for other programs that produce dynamically changing geometry.
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 George Pólya  Australian Mathematics Trust
A biography of the mathematician that discusses his solution of the random walk problem, influential books on problemsolving, Enumeration Theorem and Necklace Theorem, and efforts in curriculum development, reform, and competitions. The biography mentions
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 George W. Hart: Index  George W. Hart
An index to some of the areas covered by Hart's Web pages: Geometric sculpture; Encyclopedia of Polyhedra  over 1000 virtual polyhedra; Pavilion of Polyhedreality  images and geometry links; Hart's upcoming book about Zome Geometry; research and publications;
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 The Geowall Consortium  Paul Morin, Peter van Keken, and Jason Leigh
The consortium aims to broaden the use of scientific visualization tools for Earth science research and education by the use of low cost virtual reality visualization devices, arguing that "A combination of new projection technology, fast graphics cards
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 Gerry Stahl's Website  Gerry Stahl
Publications, teaching, research, and more by the author of Constructing Dynamic Triangles Together, Group Cognition, and Translating Euclid, among others. The founding Executive Editor of the International Journal of CSCL (ijCSCL), Stahl has researched
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 Gesellschaft für Didaktik der Mathematik (GDM)
An organization that studies methods of teaching mathematics. More information is available in German.
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 GetDP (a General environment for the treatment of Discrete Problems)  P. Dular, C. Geuzaine; Dept. of Electrical Engineering (ELAP), Univ. of Liège
A scientific software environment for the numerical solution of integrodifferential equations, open to the coupling of physical problems (electromagnetic, acoustic, thermal, mechanical, ...) as well as of numerical methods (finite element methods, boundary
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 Get Help With Your Math Homework  Cramster.com
Find homework solutions from text books, lecture notes, and solved exams written by college professors for their courses. Subscription fees required. Ask questions and answer other members' questions "for self practice, karma points and goodwill" on the
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 Get Math.com
CDs and DVDs: Solving Algebra Word Problems, Beginning Algebra, Intermediate Algebra, and The Get Math Series (10 textbooks on various math subjects). Each learning system includes embedded video of mathematic professors explaining specific exercise sets.
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 Getting Johnny and Susie To Read (their mathematics books): Teaching and Learning (MAA)  Mathematical Association of America
Articles about how to get students to read math texts and how to help them to read mathematics generally: Requiring Student Questions on the Text, by Bonnie Gold; How I (Finally) Got My Calculus I Students to Read the Text, by Tommy Ratliff; Helping Undergraduates
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 Getting Results: Free Professional Development Course for Community College Educators  WGBH Educational Foundation
The Getting Results faculty development modules are customized materials that will feature video segments illustrating exemplary practice and online resources and strategies targeted to Advanced Technology Education disciplines, making them easily available
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 Getting Slammed in Tennis  Ivars Peterson (MathTrek)
One arena where it's possible to test the apparent relationship between psychological momentum and sequences of successes or failures is bestoffive tennis matches. The question is whether the result of the first set changes the probability of success
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 GEUP  Ramón Alvarez
Interactive geometry software. Capable of handling transformations, analytic geometry, polar and cartesian coordinates, and other topics. Applicable to mechanics, optics, drawing and graphic design. Uses macros to speed construction process. Requires
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 Giant Fractal Pecan Pie
The creators of this tutorial explain that they wanted to figure out how to design a large pie that still strikes a balance between the filling (area) and the crust (perimeter). View the steps they took to construct a very enormous pecan pie in the shape
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 GiNaC is not a CAS  Bauer, Frink, Kreckel
GiNaC is an iterated and recursive abbreviation for "GiNaC is Not a CAS" (Computer Algebra System). It is designed to allow the creation of integrated systems that embed symbolic manipulations together with more established areas of computer science (like
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