Forum Geometricorum
ADD. KEYWORDS: Electronic Journal
SOURCE: Department of Mathematical Sciences, Florida Atlantic
University
TECHNOLOGY: PDF or Postscript Reader
From
quasicrystals to Kleenex
ADD. KEYWORDS: Article, Tilings, Penrose, Quasicrystals
SOURCE: Alison Boyle, Plus magazine
Geombinatorics
ADD. KEYWORDS: Printed journal, Open problems of combinatorial
and discrete geometry and related areas
Geometer's
Sketchpad Labs by Mike Riedy
ADD. KEYWORDS: Rotation & Translation Exploration, Cycloid,
Area of a Parallelogram, Area of a Rectangle
Geometric
dissections on the web
ADD. KEYWORDS: Animations of dissections, Dissections
as puzzles, Paradoxes
SOURCE: Greg Frederickson, Purdue University
Geometry
ADD. KEYWORDS: Collection of articles, Constructing the
Heptadecagon, Parabola Through Four Points, Curvature, Intrinsic and Extrinsic,
Sphere Packing In Curved Space, Min-Energy Configurations of Electrons On
A Sphere, Distinct Point Sets With Same Distances, Isospectral Sets In One
Dimension, Generating Functions for Point Set Distances, Curvature of Linear
Interpolation, Gravity Sextant, Platonic Solids and Plato's Theory of Everything,
etc.
Geometry
and the Imagination
ADD. KEYWORDS: Course Materials, Bicycle tracks, Polyhedra,
Knots, Surfaces, Mobius Band, Geometry on the sphere, Curvature of surfaces,
Gaussian curvature, Symmetry and orbifolds, symmetry groups and orbifolds,
Hyperbolic Geometry, Stereographic Projection
The
Geometry Applet
ADD. KEYWORDS: Euclid's Elements, history, interactive
pages
Geometry in Motion
ADD. KEYWORDS: Intersecting Circles, The Falling Ladder,
The Sliding Triangle, The Bent Straw, The Folded Circle, Van Schooten's Ellipse,
Congruent Triangles, Concentric Circles, The Taut String, Van Schooten's Parabola,
The Expanding Circle, The Hanging String, The Taut String, Part 2, Van Schooten's
Hyperbola, Congruent Triangles, Part 2, Pantograph of Sylvester, The Limacon
SOURCE: Daniel Scher
TECHNOLOGY: Java Sketchpad
The Geometry of the Sphere
ADD. KEYWORDS: Tutorial, Lunes, Area on the sphere, Spherical
triangles, Girard's Theorem, Similarity, Euler's formula
SOURCE: John C. Polking, Rice University
TECHNOLOGY: Java applets
The Geometry of War,
1500-1750
ADD. KEYWORDS: Museum exhibition, Gunnery, Rangefinding
and Surveying, and Fortification, Troop Formations and the Telescope, Bibliography
Geometry Online
ADD. KEYWORDS: History of Geometry, Hidden Polygons, Isosceles
Triangle Puzzler, Circles and Pythagorus, The Golden Ratio, Experiment with
Volume, School-Bus Geometry
Geometry Web Page
ADD. KEYWORDS: Lesson Plans, Tangrams, Golden Ratio, Geoboard,
Polygons, Symmetry, Constructions, Polyominoes and Polyiamonds, Star Polygons,
Special Points in Polygons, Polygon Tessellations, Kaleidoscope Tessellations,
Escher Tessellations, Space Cubes, Polyhedra, Symmetry in Space, Topological
Considerations
Golenor's
Geometry Gala!
ADD. KEYWORDS: Theorems about triangles
SOURCE: Matt Golenor and Center for Technology and Teacher
Education, University of Virginia
TECHNOLOGY: Windows Media Player and Geometer's Sketchpad
Go Geometry from the Land of the Incas
ADD. KEYWORDS: Theorems, Problems, Quiz, Puzzle, Triangle, Quadrilateral, Circle, Square, Solid Geometry, Dynamic Geometry, Archimedes, Incas, Machu Picchu, Nazca lines, Art, Van Gogh, Escher
Gomath.com - Geometry
ADD. KEYWORDS: Triangle, Parallelogram, Trapezoid, Rectangle,
Square, Rhombus, Regular N-gon, Sphere, Cube, Cuboid, Pyramid, Rectangular
Wedge, Circle, Sector of Circle, Segment of Circle, Annulus/Circular Ring,
Sector of Circular Ring, Ellipse, Frustum of a Pyramid, Cone, Frustum of a
Cone, Right Circular Cylinder, Right Circular Cylinder with Oblique Face
SOURCE: Cubic Science, Inc
TECHNOLOGY: Server side programs
Hyperbolic Geometry
ADD. KEYWORDS: Tessellations of the Unit Disk, Mathematica,
Fuchsian Groups
Hyperbolic Geometry
using Cabri
ADD. KEYWORDS: Cabri geometry, Circumscribed Circle, Isometries
of H2, Tessellation of H2 using regular triangles.
Hyperbolic Geometry
with The Geometer's Sketchpad
ADD. KEYWORDS: Constructs a hyperbolic line through two
given points, Measures a hyperbolic angle specified by three points, Measures
hyperbolic distance between two points, Midpoint, Drops a perpendicular segment
from a given point to a given line, Draws a hyperbolic circle given the center
and a point on the circle.
SOURCE: Robert J. Frank, Seton Hill College
TECHNOLOGY: Geometer's Sketchpad
Isoptikon
ADD. KEYWORDS: Geometrically defined cubic curves (isoptics)
SOURCE: Paris Pamfilos, University of Crete
TECHNOLOGY: Macintosh and Microsoft Windows program
Java
Applets on Mathematics
ADD. KEYWORDS: Sum of Angles in a Triangle, Thales' Circle,
Special Lines and Circles in a Triangle, Center of Mass in a Triangle, Cyclic
Quadrilateral, Pythagorean Theorem, Platonic Solids, Spherical Triangle
Jim Wilson's Home Page
ADD. KEYWORDS: Articles, Geometer's Sketchpad, Capturing
Area and A Solution, Orthotravels, Tangents Problem, Explorations with Heron's
Formula, Witch of Agnesi, GLaD Construction, Ratio Result for Triangles, Partitioning
a Line Segment
The Kepler Conjecture
ADD. KEYWORDS: Sphere packings, Articles, Software, Mathematica
Math Jeopardy
ADD. KEYWORDS: Competition, Problem Solving, Estimation,
Geometry, Patterns
SOURCE: Dan Ashlock, Iowa State University
Math Quilts
ADD. KEYWORDS: Tessellations, Perspective and Fractals
Math.com - Geometry
ADD. KEYWORDS: Geometry Building Blocks, Geometry words,
Coordinate geometry, Pairs of lines, Classifying angles, Angles and intersecting
lines, Circles, Polygons, Triangles, Quadrilaterals, Area of polygons and
circles, Congruent figures, Similar figures, Squares and square roots, The
Pythagorean Theorem and right triangle facts, Three-dimensional Figures, Prisms,
Pyramids, Cylinders, cones, and spheres
SOURCE: Math.com
TECHNOLOGY: Javascript
Mathematical
Cartography
ADD. KEYWORDS: Map projections
SOURCE: Hans Havlicek from the Technische Universität
Wien
Mathematical Laboratory
ADD. KEYWORDS: Pantographs, Symmetry to an axis, Symmetry
to a point, Traslation, Rotation (Pantograph of Sylvester), Glide reflection,
Homothety (Pantograph of Scheiner), Similariy (Pantograph of Sylvester), Affinity,
Inversor of Peaucellier, Prospettograph of Lambert, Product of two central
simmetries, Product of two reflections in intersecting lines
SOURCE: University Museum of Natural History and Scientific
Instruments
National Library
of Virtual Manipulatives for Interactive Mathematics - Geometry
ADD. KEYWORDS: Circular Geoboard, Cob Web Plot, Golden
Rectangle, Iterative Fractals, Mandelbrot and Julia Sets, Koch Triangle, Platonic
Duals, Platonic Solids, Polygon Fractals, Geoboard, Slicing Solids, Tesselations,
Pythagorean Theorem, Similar Triangles, Coordinate Geoboard, Isometry Transformations,
Composition Transformations
SOURCE: Lawrence O. Cannon, James T. Dorward, E. Robert
Heal, Leo Edwards, Utah State University
TECHNOLOGY: Java applets
The Peanut
Software Database Project
ADD. KEYWORDS: Lab materials, Inscribed Circles, Centroid,
Triangles, Exterior Angle, Similarity, Circle Geometry with WinGeom, WinGeom
Exercises on Angles, WinGeom Lab Manual
SOURCE: Meighan I. Dillon, et al., Southern Polytechnic
State University
TECHNOLOGY: WinGeom (Peanut Software), Word, Adobe Acrobat
reader
Poincaré
Disk
ADD. KEYWORDS: Geometry Sketchpad Scripts
PoincaréDraw
ADD. KEYWORDS: Compass and straightedge constructions
in the Poincaré disk model of the hyperbolic plane
SOURCE: Robert Foote, Wabash College
TECHNOLOGY: MSDOS program
Polyhedra
Collection
ADD. KEYWORDS: Uniform polyhedra, Duals, Johnson's solids,
Stellations of Icosahedron, Stellations of deformed dodecahedron, Spherical
Platonic polyhedra, Polyhedral Kaleidoscope, Symmetrical compounds, VRML,
Interactive building of polyhedra compounds
Symmetry and Pattern
- The Art of Oriental Carpets
ADD. KEYWORDS: Glossary, Bibliographies, Student Projects,
Asymmetry and Symmetry-Breaking, The Four Basic Symmetries, Border Patterns,
Field Patterns, Grids and Tessellations
Symmetry
and the Shape of Space
ADD. KEYWORDS: Isometries of the plane, Regular Patterns,
Orbifolds, Software, Kali, Geometer's Sketchpad
Tiling - Plane &
Fancy
ADD. KEYWORDS: The 17 wallpaper groups, Tiling and Patterns
from Historical Sources, Tiling arranged by Symmetry group, References,| Open
questions, Pythagorean Theorem, Color Tiling
SOURCE: Steve Edwards, Southern Polytechnic State University
Topology and Geometry Software
ADD. KEYWORDS: Torus and Klein Bottle games, Kali, KaleidoTile,
Exploring the Shape of Space, Computer Graphics in Curved Spaces, SnapPea
SOURCE: Jeff Weeks
TECHNOLOGY: Java Applets, Software packages for Macintosh,
Windows, Linux and Unix
Totally Tessellated
ADD. KEYWORDS: Decorative Use, Ancient and Modern, Historical
Image Gallery, Escher, Regular and Semiregular Tessallations, Mosaics, Tilings,
Related Art Movements, Dissection Tiling, Packing, Penrose Tiles, Polynominoes,
Tiling Dynamic Systems
Triangle Centers
ADD. KEYWORDS: Schiffler Point, Exeter Point, Parry Point,
Congruent Isoscelizers Point, Yff Center of Congruence, Isoperimetric Point
and Equal Detour Point, Ajima-Malfatti Points, Apollonius Point, Morley Centers,
Hofstadter Points, Equal Parallelians Point, Centroid, Incenter, Circumcenter,
Orthocenter, Fermat Point, Nine-point center, Symmedian point, Gergonne point,
Nagel point, Mittenpunkt, Spieker center, Feuerbach point, Isodynamic points,
Napoleon points
Triangle Geometers
ADD. KEYWORDS: Napoleon theorem, Ceva's theorem, cevians,
cevian triangle, Clawson point, Euler line, Feuerbach theorem, Gergonne point,
Kiepert hyperbola, Lemoine point (or symmedian point), De Longchamps point,
Malfatti problem, Morley triangle, Morley points, Nagel point, Neuberg circles,
Schiffler point, Simson line, Soddy circles, Steiner ellipse, Steiner point
Triangle Geometry
ADD. KEYWORDS: Angles, Right angles, Pythagorean Theorem,
Compass and rule constructions
Triangles
ADD. KEYWORDS: The nine-point circle, Euler's line, Morley's
theorem.
SOURCE: Alejo Hausner, Princeton University
TECHNOLOGY: Java applets
