 Geometry Homepage  ThinkQuest 1997
Illustrated tutorials on many aspects of geometry, including: triangular geometry, the Pythagorean Theorem, polygonal geometry, polyhedra, and nonEuclidean geometry. Also includes a list of important geometric formulas.
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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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 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 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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 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 Online  Cynthia Lanius
Geometry activities from a geometry class at Milby High School in Houston, Texas. Topics include: History of Geometry (contributions of Egyptians, Babylonians, and Greeks, with links to biographies of major contributors to geometry); Hidden Polygons (locate
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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  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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 geometryprecollege  Math Forum
A discussion group accessible as a Webbased discussion, a mailing list, or a Usenet newsgroup, for discussions concerning school geometry curricula, teaching geometry, new software and texts, problems for students, and supplementary materials such as
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 Geometry Problem of the Week  Annie Fetter, the Math Forum
The Geometry Problem of the Week (PoW) is a regular feature of the Math Forum, providing students an opportunity to answer questions and receive feedback and recognition from Forum staff. A Teacher Support page is available for some problems.
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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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 The Geometry Section (Zona Land)  Edward A. Zobel
Fractals (fractal tree, VRML fractal monoliths), common shapes (circle, rhombus, trapezoid), areas and volume (box, cylinder, box with cylindrical hole), coordinate geometry (VRML (x, y, z) Axes and Planes Worlds), and points, lines, and planes (symbol
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 Geometry (Seeing is Believing)  De Silva, D'Andreti; ThinkQuest 1997
A geometry tutorial, comprising: the basic building blocks of geometry; segments and rays; angles; parallel lines; triangles; polygons; right triangles (Pythagorean theorem); geometric inequalities; ratios, proportions and similarities; trigonometry;
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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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 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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 GirlTECH  Cynthia Lanius; Center for Research on Parallel Computation (CRPC)
GirlTECH was a teacher training and student council program that encouraged young women to pursue careers in mathematics and science, offering intensive technology training to explore innovative teaching strategies for gender equity in the classroom through
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 Graphing Calculator  Pacific Tech
Graphing Calculator is a tool for quickly visualizing math: type an equation and it is drawn for you without complicated dialog boxes or commands. Graphing Calculator 2.2, a commercial release, features symbolic and numeric methods for visualizing two
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 GraspMath  Summit Interactive
Interactive CD and Video Courses to purchase: Elementary Math, Algebra, Geometry, High School Exit Exam Prep, Trigonometry, Calculus, TI Calculators and more. Stand alone math courses with assessments and guides; remedial math program supplements; tutorials
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 Great Math Programs  Xah Lee
A listing about 40 excellent recreational math programs for Macintosh that do: polyhedra and Rubic cubes, curves and surfaces, fractals and Lsystems, tilings and symmetry, game of hex and game of life, chess and fiveinarow, peg solitare and polyominos,
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 The Great Paper Airplane Challenge (TEAMS)  Jeannie Toshima; TEAMS Distance Learning, Los Angeles County Office of Education
Use origami to build the farthest flying airplane, and win the challenge. TEAMS looked for the farthest flying airplanes throughout the nation  the best
from each class. Students sent in the written directions (diagrams were acceptable) for folding
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 Greek Mathematics and its Modern Heirs  SunSITE's Vatican Exhibit; Library of Congress
Classical roots of the scientific revolution. An essay on the history of Greek Math, with sample math problems. Covers Euclid's Elements and Optics, Archimedes' Works, Piero della Francesca's De quinque corporibus regularibus, and links to Ptolemy's Geography
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 The Grey Labyrinth  Kevin Lin
A collection of mindbenders in math and logic. When a solution to one puzzle is posted, another solutionless puzzle is added. With an archive of past puzzles, links to other puzzlerelated sites, and a bibliography of works that inspired this site.
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 Habits of mind: an organizing principle for mathematics curriculum (Connected Geometry)  Cuoco, Goldenberg, Mark; Education Development Center, Inc. (EDC)
A curriculum the goal of which is not to train large numbers of high school students to be university mathematicians, but rather to allow high school students to become comfortable with illposed and fuzzy problems, to see the benefit of systematizing
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 Handson Math: Activities for the Elementary Classroom  Janine Parker
Lesson plans for children in grades one through six about topology, number patterns, and geometry. Handouts for each lesson may be downloaded in PostScript form or as GIF files, and a zipped DOS program to display Platonic solids, Archimedean solids,
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 handsonmath.com  Charles Gronberg
Handson geometry model building materials to purchase, tested and test marketed by the American Association for the Advancement of Science in the late 1990s with the intention of targeting atrisk middleschool students (minorities and girls). The
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 Harnessing Technology to Serve Adult Literacy: Math  David J. Rosen
Frequently Asked Questions on how to help adult literacy education (ABE/GED/ESL/ESOL) teachers and learners use computers, television, audio and video cassettes, and other electronic technology to solve learning and instructional problems: "Our students
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 HarvardMIT Math Tournament  Early, Owen
The HarvardMIT Math Tournament is an annual math tournament for high school students. Categories of tests typically include algebra, calculus, combinatorics (formerly "advanced topics"), geometry, general, oral, team, and guts; minievents include Buzz
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 helaman ferguson sculpture  Helaman Ferguson
A mathematician sculptor whose stone and bronze artworks include "Aperiodic Penrose," the Coons Siggraph award, "Esker Trefoil Torus," "Fibonacci Fountain," "Fibonacci Tetrahedron," "Figureeight Knot," "Eine Kleine Link Musik," "Torus with CrossCap,"
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 High School Homework
Highschoolhomework offers homework help in the following subjects  algebra, geometry, trigonometry, calculus, biology, chemistry, physics and economics.
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 High School Mathematics  Cem Giray
Site contains lecture notes, exams, quizzes, assignments, challenging problems, curricula (in this case meaning topics of study), and olympiad materials of high school level for teachers and students. Some materials are web pages, some are in PDF format,
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 High School Projects (COMAP)  Consortium for Mathematics and Its Applications
Products developed in print, video, and multimedia formats, supporting the NCTM Standards, to bring mathematical modeling into high schools around the country, and present mathematics in contexts that are relevant to students. Curriculum: Mathematics:
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 Hilbert's Building Blocks  Robert J. Krawczyk
Investigating space curves to construct 3D forms. Work in 2D with Hilbert curves, spirolaterals, space filling curves, and recursive designs used as a springboard for generating and interpreting space curves.
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 Homework Help  Homeworkhelp.com, Inc.
Over 1000 tutorials, indexed for searching, for help with math, English, science, and ESL. Middle School math (grades 68) covers fractions, decimals, percents, graphing, functions, geometry, etc. High School math offers prealgebra, algebra I and II,
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 The Honeycomb Conjecture  Ivars Peterson  Science News Online
Mathematician Thomas C. Hales of the University of Michigan at Ann Arbor has formulated a proof of the socalled honeycomb conjecture, which holds that a hexagonal grid represents the best way to divide a surface into regions of equal area with the least
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 Hope's Mathematics Books for Teachers  Hope Martin
A collection of math activity books to order for elementary, middle school, and high school students, written by Hope Martin: What Year am I?: A Math Warmup a Day, Multiple Intelligences in the Mathematics Classroom, 730 Daily Math Warmups, Integrating
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 HOT Math  Pauline Vos
Handson tasks in the mathematics classroom, a resource site for teachers of students around 14 years of age. Among the topics are angles, symmetry, scale drawing, balance algebra, tables, combinations, statistics, probability, reasoning, finding rules
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 How round is your circle?  Bryant, John; and Sangwin, Chris
These photos and QuickTime movies accompany the book How Round Is Your Circle? Where Engineering and Mathematics Meet. See, in particular, the illustrations of how to drill a square hole. Sections include Falling apart (the Pythagorean Theorem, Dudeney's
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 How to Correctly View a Flatland Painting  Mark Schlatter
A paper with Java illustrations: Given a two dimensional painting of a three dimensional object, you can use geometry to find the ideal viewing locationthe position where the image appears most three dimensional. This site reviews that geometry (using
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 Hunting for Higher Dimensions  P. Weiss  Science News Online
Experimenters test new theories suggesting that extra dimensions are detectable, not as small as predicted by string theory. Inspired by recent theoretical insights, physicists at accelerators and in gravitational laboratories are searching for clues
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 HyperCube  Harmen van der Wal
A stereoscopic 4D Java game in and around the hypercube (stereoscopism optional). The page also includes instructions on how to see in four dimensions, and how to see stereograms (read "rotated cubes" for "twisted cubes" in the 4D piece). See also Point
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 HyperCuber  Greg Ferrar
A Java applet that lets you rotate a fourdimensional cube in four dimensions. HyperCuber is a freeware program for 680x0based Macintosh computers that displays and rotates wireframe objects of arbitrary dimension, like hypercubes (fourdimensional cubes).
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 HyperGami and JavaGami  Ann & Mike Eisenberg; Inst. of Cognitive Science, Univ. of Colorado, Boulder
HyperGami and JavaGami are software environments for designing and building paper sculpture. Choose from a number of starting polyhedra, which appear in a 3D window alongside a corresponding "folding net" in a 2D window. Employ both builtin features
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 Hypermedia Textbook for Grades 612 (MathMol)  NYU/ACF Scientific Visualization Laboratory
Designed for middle school students, but also useful for students of high school chemistry. Introductory concepts: mass, weight, volume, density, scientific notation, our 3dimensional world, VRML, geometry quiz, the geometry of 2 and 3 dimensions, and
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 Hyperspace Structures: Exploring the Fourth Dimension  Burbanks, Beardmore
Mpeg Movies and pictures illustrate: 1. The Hypercube: a 4 dimensional analogue of the cube. Details of its construction, along with movies of a spinning hypercube. 2. An "Inflated Hypercube": approximating the hypersphere. 3. Hypertorus: Adding together
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 iCoachMath.com  HighPoints Learning, Inc.
iCoachMath.com coaches students online; and provides teachers with student performance reports, customized test papers, and math resources such as lesson plans aligned to state and national standards. The site freely offers an illustrated dictionary of
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 The Ideal Voting System (Math Chat)  Frank Morgan, MAA Online
Answering the challenge: What is the shortest line segment fencing off prescribed area 0 < A < 1 in a unit square? (What about the leastarea piece of plane dividing off prescribed volume 0 < V < 1 in a unit cube? What about a 4D cube?) ...assume
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 iFigure
Links to online calculators and worksheets that provide information to help in planning, solving and making decisions for problems and tasks such as buying a home, investing money, figuring business profits, making statistical comparisons, or calculating
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 Illustrated 4D Computer Graphics  Kirby Urner, 4D Solutions
Curriculum Concepts from the Fuller School. Primitive topologies: nonEuclidean definitions of points, lines, planes as nonzero, parameterized entities, with light affecting properties in ray traced views; Concentric hierarchy: a reference frame relating
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 Improving Measurement and Geometry in Elementary Schools (IMAGES)  Research for Better Schools (RBS)
Information and resources designed to help teachers develop a deeper understanding of geometry and measurement concepts and to assist in designing meaningful instruction for elementary students. Topics addressed include: cognitive and developmental issues;
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