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  1. Equation Search - Octahedron, LLC
    Browse common equations in algebra, geometry, trigonometry, calculus, probability, and finance; or perform keyword searches by equation name, variable name, constant name, and category. ...more>>

  2. Erich's Packing Center - Erich Friedman
    A huge collection of packing problems, each explained with graphics. 2D examples include Triangles in Squares, Circles in Squares, Squares in Squares, Triangles in Triangles, Circles in Triangles, Squares in Triangles, Triangles in Circles, Circles in ...more>>

  3. Escuela Virtual
    From Mexico, a non-profit organization offering a collection of links and documents in Spanish for students and teachers in secondary school. You can also write to someone who can answer your questions about homework or anything about school. Look for ...more>>

  4. ExcelGrade eLearning
    Online tutoring in math, science, and English, using a proprietary headset and whiteboard. Details, including testimonials and pricing, on the web. ...more>>

  5. Exercises in Imagination (Geometry and the Imagination) - Conway, Doyle, Gilman, Thurston; The Geometry Center
    How do you imagine geometric figures in your head? Most people talk about their three-dimensional imagination as 'visualization', but that isn't exactly right. A visual image is a kind of picture, and it is really two-dimensional. The image you form in ...more>>

  6. Experiencing Geometry in Euclidean, Spherical, and Hyperbolic Spaces - David W. Henderson; Cornell University
    A book that presents a series of problems. Most of the chapters start intuitively and are accessible to a general reader with no particular mathematics background; however, the discussions were written for mathematics majors and mathematics teachers and ...more>>

  7. Exploring Hyperspace with the Geometric Product - Thomas S. Briggs
    This paper presents an area of higher-dimensional geometry to a general audience. It also highlights areas where new discoveries could be made. This exploration encounters double prisms, the double cylinder, prism cylinder, flat torus, spherical hypercylinder, ...more>>

  8. Exploring the Shape of Space - Jeff Weeks; Key Curriculum Press
    Geometry and cosmology for grades 6-10. Lessons and activities to accompany the computer-animated video The Shape of Space (also available on CD-ROM and based on Jeff Weeks' book by the same name). Each lesson includes teacher notes, blackline master ...more>>

  9. Expository Papers from the Geometry Center
    Documents written at the Geometry Center that take advantage of hypertext to present information about mathematics or the Geometry Center in a style accessible to a wide audience. Engineering Education at the Geometry Center (Keynes, Wicklin); Outside ...more>>

  10. EZ Learning Solutions
    EZ Learning Solutions Study Guides are part of a family of study aids designed with a "back-to-basics" approach in mind. They are intended for use by students, parents, or teachers, and should be especially useful for the new math curriculum in Ontario. ...more>>

  11. Fano Varieties and Extremal Laurent Polynomials - Coates, Tom; Corti, Alessio; Galkin, Sergey; Golyshev, Vasily; Kasprzyk, Al
    This research collaboration blogs about the creation of a directory of all possible shapes and geometric building blocks in the universe -- the equivalent of a periodic table of the elements for three-, four-, and five-dimensional shapes. Along the way, ...more>>

  12. Fast Facts (Math On Line) - D. Kell; Mercer County Community College
    Link listings for math concepts, from whole numbers and fractions to advanced equations, logic, and probability. ...more>>

  13. Fast Marching Methods and Level Set Methods - J. A. Sethian, University of California-Berkeley
    Fast Marching Methods and Level Set Methods are numerical techniques that can follow the evolution of interfaces. These interfaces can develop sharp corners, break apart, and merge together. The techniques have a wide range of applications, including ...more>>

  14. Figure This! Math Challenges for Families - National Council of Teachers of Mathematics (NCTM)
    Elementary-level problems with hints, information about when and why answers matter in the real world, suggestions for getting started, and answers with explanations. A Challenge Index lists problems by topic. Examples include: Line Up! (How long do you ...more>>

  15. Finite Element Mesh Generation - Robert Schneiders
    Mesh generation is an interdisciplinary area within numerical analysis that includes mathematicians, computer scientists, and engineers from many disciplines. This page is intended to build a bridge between theory and applications. People and research ...more>>

  16. Flatland: A romance of many dimensions - Edwin A. Abbott
    A geometrical story about a two-dimensional square who visits one- and three-dimensional worlds. Full text of the 2nd and revised edition, illustrated, 1884. ...more>>

  17. Flatland: the Movie - Flat World Productions, LLC
    This movie, available in DVD format, is based on Edwin A. Abbott's classic novel, Flatland: A Romance of Many Dimensions. Flatland is a world that exists entirely on a two-dimensional plane. All different kinds of shapes live, work, and play in this world. ...more>>

  18. Folding and Unfolding - Eric Demaine
    A series of pages detailing research and findings in origami, including: fold and cut, folding silhouettes and wrapping polyhedra, map folding, unfolding polyhedra, folding polygons into polytopes, linkages, protein folding, hinged dissections, hyperbolic ...more>>

  19. Folding Paper in Half 12 Times - The Historical Society of Pomona Valley
    In 2001, a high school junior from California successfully folded a single sheet of paper in half 12 times, dispelling the long-held conventional wisdom of 7 folds as the maximum. See the limiting equation for single and alternate direction folding that ...more>>

  20. Formulas - Math Forum; Ask Dr. Math FAQ
    Formulas for: Defining Geometric Figures (plane and solid figures, and a note on dimensions); Geometric Formulas (two- and three-dimensional figures: perimeter, area, volume, etc.); Analytic Geometry Formulas (one, two, and three dimensions: points, directions, ...more>>

  21. Fourth Dimension: Tetraspace - Garrett Jones
    This page attempts to explain how the world would work if there were a fourth spatial dimension in addition to the three that we know. ...more>>

  22. Free Math Resources - Varsity Tutors
    Free math questions of the day, flashcards, more than a hundred diagnostic tests, and thousands of practice tests. A private tutoring service, Varsity Tutors also offers practice for standardized tests such as ACT, SAT, GRE, GMAT, LSAT, MCAT, ISEE, and ...more>>

  23. Free Math Tutoring - Doug Simms
    Online instructional videos, many accompanied by example and exercise sheets. Use of the site is free. ...more>>

  24. Free Math Worksheets, Word Problems, Math Quiz, Math Puzzles and Free Math Games - MathOcean.com
    This blog is dedicated to provide free worksheets, word problems, simple problems, story problems, math quizzes, math puzzles, math games and much more. ...more>>

  25. Future School
    Developer of educational software, online tutoring, and home schooling courses. Video tutorials. Sample lessons and ordering information available. ...more>>

  26. Gallery of Mathematical Images - Dept. of Mathematical Sciences, Loughborough University, UK
    The Mandelbrot Set (frames from an animation); Quaternionic Fractals (an extension of the complex numbers - Mandelbrot and Julia sets); Hyperspace (4-dimensional structures projected into 3-dimensional space); Molecular Dynamics (images from simulations, ...more>>

  27. Gamelan - The Official Java Directory - EarthWeb, Inc.
    Gamelan's primary mission is to serve as a central registry and directory of Java resources. Much like Yahoo!, Gamelan collects links to resources stored on other sites across the Web. However, unlike Yahoo!, Gamelan's mission is specific - Gamelan collects ...more>>

  28. GEM: Gateway to Educational Materials - National Library of Education (NLE)
    A database for education links, intended to be more useful for teachers than a search engine. It records the resources of its consortium members (information on joining the consortium is available onsite). Users are able to: browse through lists organized ...more>>

  29. General Mathematics, A-M (Funk & Wagnalls Multimedia Encyclopedia) - Lycos Zone: Mathematics
    Short articles on basic mathematics, including biographical information about mathematicians, from the abacus to Gaspard Monge. ...more>>

  30. General Mathematics, N-Z (Funk & Wagnalls Multimedia Encyclopedia) - Lycos Zone: Mathematics
    Short articles on basic mathematics, including biographical information about mathematicians, from John Napier to Zeno of Elea. ...more>>

  31. Geocadabra - Ton Lecluse
    Download a demo or purchase this dynamic geometry software, which draws solid geometry, plane geometry, functions and curves, 1-point perspective, 2-point perspective, 3-point perspective, and more. Also available in Dutch. ...more>>

  32. GeoGebra
    GeoGebra is free dynamic mathematics software for schools that joins geometry, algebra, and calculus. Help, examples, screenshots, and more are available online. The GeoGebraWiki is a free pool of educational materials for GeoGebra where anyone can contribute ...more>>

  33. GEOLAB WWW Server - NASA Langley Research Center GEOmetry LABoratory
    Home surface modeling and grid generation. In engineering analysis, a critical component of the numerical solution process is the development of a discrete representation for the physical domain of interest. This discretization into surface and volume ...more>>

  34. Geomet3D - Juan-Carlos Criado-Alamo
    Geomet3D is an analytic geometry program in 3D. You can plot points, vectors, lines, and planes; and do basic analytic geometry operations with them. ...more>>

  35. Geometiles - Yana Mohanty
    Interlocking tiles for exploring plane and three-dimensional geometry, among other math topics. Purchase provides access to a variety of workbooks. Blog posts by creator Mohanty, an electrical engineer who earned a PhD in mathematics before teaching college ...more>>

  36. Geometrí con Cabri Géomètre II - José Antonio Mora
    Materiales interactivos para el aprendizaje de la Geometría con la utilización del programa Cabri-Géomètre II. Geometría de los Mecanismos; Coordenadas en Cabri II. Cabri sketches that simulate the working procedure ...more>>

  37. Geometria - Valerio Capello
    A program for computing lines, surfaces and volumes of the main plane and solid figures, through direct and indirect formulas. Select the figure you are working on, choose the kind of calculation from the list provided, and then click the Compute button ...more>>

  38. Geometrical Dimensional Analysis: Map of Physics - John Aikman
    A text article and a tutorial, with references and links. Familiar equations and formulas of physics arranged into 3D structures create concept maps of the system of units and a potential for super-formulas: more powerful formats for use of existing mathematical ...more>>

  39. Geometrical relations for Circles, Spheres, and Cylinders - Tom Solomon, Bucknell University
    Diagrams and mathematical equations relating to these simple geometric shapes. ...more>>

  40. Geometric Modelling Library - Renishaw plc
    A C++ library of 3D geometric modeling algorithms and bespoke software development servicesf or complex geometric operations. Trial download available, as well as commercial, academic, and personal licenses. ...more>>

  41. Geometric Models (The Geometry Junkyard) - David Eppstein, Theory Group, ICS, UC Irvine
    An extensive annotated list of links to material describing physical objects corresponding to geometric constructions (and methods for creating such objects), particularly polytopes. ...more>>

  42. Geometric Sculpture - Elias Wakan
    Sculpture inspired by a love of geometric form. ...more>>

  43. Geometric Sculpture - George W. Hart
    Geometric forms from the author of Multidimensional Analysis and the Encyclopedia of Polyhedra. As a sculptor of constructive geometric forms, Hart's work deals with patterns and relationships derived from classical ideals of balance and symmetry. He ...more>>

  44. Geometry Algorithms - Dan Sunday, softSurfer
    Resources for developing geometry algorithms and computer graphics software: overviews, histories of geometry, a gift shop, and more. The archive of algorithms includes areas of triangles and polygons; lines and distances of a point to a line; fast winding ...more>>

  45. The Geometry Applet - David Joyce; Dept. of Mathematics & Computer Science, Clark University
    A Java applet used to illustrate Euclid's Elements - an illustration from Euclid's Elements Book I Proposition 22. Another example using this Geometry Applet illustrates the Euler line of a triangle. Version 2.0 does three-dimensional constructions, whereas ...more>>

  46. 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. ...more>>

  47. Geometry - Elmer G. Wiens; Egwald Web Services Ltd.
    A collection of interactive geometric objects represented graphically including 3D-graphics, space curves, trigonometric functions, hyperbolic functions, and the trajectory of projectiles. ...more>>

  48. Geometry Everywhere - Betty R. Allen; Kodak
    An activity intended to make students more aware of geometric shapes and lines in objects around them. Students were divided into five groups, four to photograph geometric shapes and concepts at home, on the farm, in town, and at the lake, and one group ...more>>

  49. geometry-forum - Math Forum
    A discussion group accessible as a Web-based 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. ...more>>

  50. 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 pseudo-rosettes, rombix, K-patterns (images derived from partial sums of power ...more>>

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