All Sites - 219 items found, showing 151 to 200

Polyhedra - Peter Cromwell Ancient manuscripts from Egypt and China relate ideas concerning the calculation of the volumes of polyhedra, while the Greek tradition of geometry gave us the construction of the regular polyhedra or Platonic solids. In modern times, polyhedra and their ...more>> Polyhedra plaited with paper strips - H. B. Meyer A guide to generating certain polyhedra (Platonian, Archimedian and other solids) by plaiting paper strips (glueless method). In several cases pattern download of the paper strips is possible. In German and English. ...more>> Polyhedra - Rolf Asmund A gallery of regular polyhedra, snub uniform polyhedra, deltahedra (polyhedra consisting only of equilateral triangles), and polychora; with animations, still graphics, and some taxonomic data (vertices, edges, faces, polygons, radii, and more). Mobius ...more>> Polyhedra Sketches - Bill Finzer, Key Curriculum Press Sketches showing the platonic solids in true perspective. You have control over the placement of the picture plane, the station point, and the horizon. An animation button rotates the figure. Some of the sketches show in 3D if you have a pair of 3D glasses. ...more>> Polyhedron: An application in solid geometry - Stelian Dumitrascu Software based on "deduction-free geometry," which allows the user to perform various actions upon solids as if holding these solids in your hands. It simulates a number of tools, such as the ruler, protractor, setsquare, compass, bisector, saw, and eraser. ...more>> Polyhedron Models Custom Built - George Olshevsky Buy models constructed from stiff 65-lb colored cover stock; or, from the page Go to Nuts About Nets! order prints of polychora nets. Symmetric figures in solid geometry have fascinated people since ancient times. Early Egyptians played with icosahedral ...more>> Polyhedrons: PolyMod Polyhedron Modeler - Daniel Grunberg An experimental K-12 and college-level Windows software program that allows the user to create both regular and irregular 3-dimensional polyhedrons on the screen and view them from different angles, then print out a polyhedral net or template and glue ...more>> Polymorf - Rick Engel A math manipulative, construction set toy, model building kit, and 3D puzzle all in one, used for modeling polyhedra and the structure of molecules and crystals. Build life-like geometric models of creatures, vehicles, and structures. For all ages. ...more>> Polyominoes - Kevin Gong Information and Polyominoes software to download. A polyomino is a piece made up entirely of squares connected edge-to-edge. For example, a domino is a polyomino with 2 squares. In this program, you can use pentominoes, tetrominoes, trominoes, hexominoes, ...more>> Polytopes, Zonohedra, Zonotiles, Mathematica notebooks - Russell Towle Some of the author's endeavors in geometry, including studies of zonohedra, polyhedra, space-fillings, polytopes in higher space, and the discovery of new types of polyhedra and space-fillers. Mathematica notebooks are provided which create these kinds ...more>> Praktick - Praktick Learning private Ltd. Auto-scoring practice problems aligned to the UK's Central Board of Secondary Education (CBSE) Standards, from pre-kindergarten to grade seven. Questions adjust dynamically based on performance, while a timer counts up response time; incorrect answers ...more>> Productive Struggle Group blog, with most contributions by secondary math and science teachers, that aims to "push teachers to learn in the same way that we push our students to learn" and "work together to make our struggles productive." Posts, which date back to March, ...more>> Professors Rethinking Options in Mathematics for Prospective Teachers (PROMPT) - Humboldt State University Mathematics Department A program funded by the National Science Foundation to bring together mathematics faculty members from across the country to explore the question, "How can we prepare elementary school teachers to teach for the future rather than the past?" The purpose ...more>> Punctured Polyhedra - Ivars Peterson (MathTrek) A tetrahedron has four triangular faces, four vertices, and six edges. When a vertex of one tetrahedron pierces the face of a second tetrahedron it forms a new, more complicated polyhedron: one triangular face has a triangular "hole" where the face was ...more>> Puzzles - Martin Watson Blogs, comments, musings, design sketches, and photographs of mechanical puzzles by an avid collector and craftsman. Puzzle news, the author's own burrs (Watson's wormhole, digigrams, Dutch cubist), in-depth explorations of manipulative puzzles (Puzzles ...more>> Recreational Mathematics Topics - Steven Dutch; University of Wisconsin - Green Bay Contents: Symmetry, Crystals, Polyhedra and Tilings: an extensive, illustrated collection including reflectional and rotational symmetry; repeating patterns in two and three dimensions; building crystal forms with unit cells; regular, Archimedean, radial, ...more>> Rectilinear Geometry (The Geometry Junkyard) - David Eppstein, Theory Group, ICS, UC Irvine An extensive annotated list of links to material on geometric problems defined on squares and rectangles, higher dimensional boxes, cubes, and hypercubes, right triangles and other right-angled figures, and "taxicab geometry" in which distances are measured ...more>> Regular Solids - Jim Loy An elementary introduction to regular polyhedra, solid geometric figures with identical regular polygons as their faces and the same number of faces meeting at every corner (vertex). ...more>> Rhombic Dodecahedron: Hidden Within or Surrounding the Cube? - Joyce Frost, Kris Koch, Park City Mathematics Institute This activity illustrates the interconnections between a cube and a rhombic dodecahedron, using a Zome Tool or drinking straws and ribbons. One of the PCMI Resources for Teachers. ...more>> Rubik's Cube Information - Michael Reid All about Rubik's Cube - even a mailing list. Site contents include: the Nederlandse Kubus Club; Rubik's cube pages on the Web; Cube books; Sources of cube-like puzzles; the author's notes, including an optimal cube solver; other Cube solutions on the ...more>> Rubik's Cube Java Applet - Michael Schubart To twist the cube, press the mouse button over a cubelet face that belongs to the slice you want to move. Keeping the button pressed, drag the mouse in the desired direction; then release the button. Moving the whole cube is done in the same way - just ...more>> Rubik's Games - Androsoft Dedicated to the first PC CD-ROM game from Erno Rubik, Rubik's Games contains 5 sub-games: Rubik's Classic, Cover Up, Paint War, Rubik's Playground and ZigThrough. Download the Rubik's Games Web Site Plugin plug-in or a demo of the Rubik's Game CD-ROM. ...more>> Rubik's Online - Rubik/Seven Towns The official online site for the Rubik's cube. Play with the cube and other Rubik's games and puzzles online; find information on where to buy Rubik's products; use the forum to exchange views, opinions, comments, suggestions and anecdotes related to ...more>> Rubix Corner - Duane Cash The site includes information regarding the Duane Cash Cube Collection now featured at Hessport's Rubikshop in their "collectibles" section. New puzzles include the Rubik's Triamese, Fusion, Fusion+, SpeedFusion, 5x3, and 4x3 Cubes, which give those interested ...more>> Selected Recent Publications - George W. Hart Areas of Hart's research and pointers to further information, including a bibliography of his publications. Links to pages on: Multidimensional Analysis; Nonintrusive Appliance Load Monitoring; Telecommunications Network Management; Viterbi Algorithm ...more>> SketchMad - Nathalie Sinclair An archived resource, not currently updated: A resource center devoted to using The Geometer's Sketchpad in the classroom. Includes tips, strategies, lesson plans, and sketches for beginning and intermediate Sketchpad teachers, stories from the classroom ...more>> Solids Workshop - FacticsMax A program that allows you to select a square, triangular, pentagonal, or hexagonal prism, pyramid, or frustum; or a cylinder or cone, choose the height, side, (and frustum height) you desire, and print out a net pattern that will fold up into the selected ...more>> Solving Rubik's Cube - David Lee Winston Miller A "best-fast" Arity Prolog program and demonstration of an efficient heuristic search method to solve Rubik's Cube. Examine the cube's topography (its flat layout) and "submachines." Documentation includes "Understanding the problem," "Why this approach ...more>> Solving the Rubik's Cube - Matthew Monroe Instructions, popularized by Minh Thai, the National Champion cube solver, for solving a 3x3x3 Rubik's Cube. Also, instructions for how to solve a cube when it has oriented pictures on each face. Directions for solving a 2x2x2 Rubik's mini cube, the professor ...more>> The Soma Cube Puzzle - Modvix Purchase the Soma Cube. Piet Hein, a Danish poet and inventor, visualized the set of all irregular shapes formed by no more than 4 cubes, each of the same size, and realized that the seven simplest irregular combinations of cubes can form a larger Soma ...more>> Some Solid (Three-dimensional) Geometrical Facts about the Golden Section - Ron Knott Phi and three-dimensional geometry - Dice Shapes; Coordinates and other statistics of the 5 Platonic Solids; The Greeks and the platonic solids; Quasicrystals and Phi; Footnotes on Plato and Euclid, and on shapes for fair dice. ...more>> sonata mathematique - Rachel Kernodle Blog by a high school math and learning specialist. Posts, which date back to June, 2011, have included "twitter math camp," "mathematical art," "i also want you to learn…," and "rational functions take two." ...more>> South African Puzzle Club - sapuzzleclub.co.za "Refining the Art of Puzzling," this club serves as an online center for "like-minded people together with a passion for puzzles.... [to] grow the hobby of metagrobology in South Africa." With web forums, articles, galleries of mechanical puzzles, and ...more>> SpaceBric Tetrahedral linking blocks and design software using that shape. Download trial versions of the software or get the fully-featured versions with a registration key. Blocks may be purchased on line as well. SpaceBric also offers school fundraising and ...more>> SpaceShape - Matt Storz SpaceShape is a Windows95 program that allows various 3D shapes to be created and then flattened so that a pattern can be printed to make a model of the 3D shape. Various 3D shapes are supplied with the program (octahedron, dodecahedron, icosahedron, ...more>> Spidron System - Daniel Erdely Erdely calls a planar, plane-filling object a Spidron. Upon three-dimensional deformation subject to specific constraints, the planar system generates a regular, dynamic, geometrical construction. Erdely's experiments have led to the idea of creating ...more>> Stella: Polyhedron Navigator - Robert Webb "Small Stella" is a program for viewing polyhedra and printing their nets so you can build your own. It has over 150 built-in models, plus their duals. Models include Platonic solids, Archimedean, Kepler-Poinsot, Johnson solids, "Near Misses," and Stewart ...more>> Stellated Icosahedra - Roman Maeder An excerpt of an article published in Mathematica in Education. There are 59 stellations of the icosahedron; these pages contain various images of them, ordered by increasing circumradius, and some background information. The metric properties and graphics ...more>> studio:ludens - Wouter Walmink and Alexander Rulkens Free online tools that "let you play with your own creativity," designed by two Dutch industrial and interaction designers in Eindhoven. Create your own patterns with Repper; your own tessellating coasters with Epa:kato; your own fractals and other complex ...more>> studymaths.co.uk - Jonathan Hall Free help on your maths questions. See also the bank of auto-scoring GCSE maths questions, games, and resources such as revision notes, interactive formulae, and glossary of terms. ...more>> Surface Area of a Rectangular Solid - NASA Lewis Learning Technologies Project What is the surface area of a rectangular solid whose length is 6 centimeters, depth is 5 centimeters, and height is 4 centimeters? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test. ...more>> Symmetry - Rick Engel A lesson on the symmetry of the Platonic and Archimedean solids using Polymorf, a math manipulative product. Demonstrates inscription, truncation, sectioning, and space filling with polyhedra. ...more>> Synergetics on the Web - Kirby Urner, 4D Solutions R. Buckminster Fuller's "explorations in the geometry of thinking" is detailed in two thick volumes, Synergetics and Synergetics 2. Synergetics thoroughly permeates the rest of Fuller's writings as well. The invention for which Fuller is most famous, ...more>> Termesphere Gallery - Dick Termes Spherical paintings that use a six point perspective. View images of the paintings and read about the artist. Products and services include workshops, lectures, books, and models of the Platonic solids, as well as the painted spheres. ...more>> Tessellated Polyhedra - Jill Britton Full-page printable nets of each of the regular polyhedra, decorated with individual surface tessellations in full color. A higher-resolution black-and-white version of each tessellated net appears in Polyhedra Pastimes, by Jill Britton, published by ...more>> Tetrakys Interlooping equilateral, isosceles, and scalene triangles for building two- and three-dimensional geometric objects, exploring area and volume, and visualizing fractions and arithmetic operations. The foam composition of these colorful manipulatives ...more>> Thinking Fountain - Science Museum of Minnesota Thinking Fountain offers surprising and personal connections to science. It's a living card file full of ideas and activities. Includes the opportunity to add your own projects. See Shapes Cluster: Shapes & Math: Shape Walk, I C Shapes, Bubble Geometry, ...more>> TI-89 Calculus Calculator Programs TI-89 calculator programs for sale. Enter your variables and see answers worked out step by step: a and b vectors, acceleration, area of parallelogram, component of a direction u, cos(a and b), cross product, curl, derivative, divergence of vector field, ...more>> Tilings (Graphics Archive, Special Topics) - The Geometry Center Regular subdivisions of the plane or space. ...more>> Timothy Kasper Screencast geometry lessons, most less than five minutes long, narrated by a seventh grade teacher in Indiana. ...more>>

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