- Area and Volume Formulas
- Includes basic formulas for common geometrical figures.
- Bob's Pages
- An interactive presentation of different geometric figures, including polyhedra, fractals, the arbelos, logarithmic spiral and Soddy's Hexlet.
- The Complete Quadrilateral
- An interactive column by Alex Bohomolny, discussing theorems and presenting illustrative demonstrations through java-enabled applets.
- Cubical Box Distances
- Uses java-enabled applets to determine distances. Also provides problems and calculations on surface distances on a cuboid.
- Diamond Theory
- Description of new geometric theory, which reveals that Euclidean symmetry may be invariant under rather interesting groups of noncontinuous (and asymmetric) transformations.
- Encyclopedia of Triangle Centers
- A compendium of more than 1,000 triangle centers. Also includes links related to triangle centers.
- Erich's Packing Center
- Illustrated solutions to several covering, packing, and tiling problems. Includes some animated demonstrations.
- Geo Doubek
- Applet that draws Lissajous Figures.
- Geometry Activities
- Filled with problem-solving modules for simplified geometry.
- Geometry and the Imagination in Minneapolis
- A collection of handouts during a two-week summer workshop held at the Geometry Center, from June 17-28, 1991.
- The Geometry Center
- A unified mathematics computing environment supporting math and computer science research, mathematical visualization, software development, application development, video animation production, and K-16 math education.
- Geometry Formulas and Facts
- Presents a document excerpted from the CRC Standard Mathematical Tables and Formulas (30th edition, 1995). Excerpt does not cover differential geometry.
- Geometry in Action
- Page collects various areas in which ideas from discrete and computational geometry (meaning mainly low-dimensional Euclidean geometry) meet some real world applications.
- The Geometry Junkyard
- A collection of geometry materials such as usenet clippings, web pointers, excerpts, papers, abstracts, programs and other materials that are entirely mathematical in nature.
- Geometry Page of the Interactive Mathematics Miscellany and Puzzles
- Includes various geometry topics, some accompanied by Java-enabled applets, for teachers who want to enliven their web pages or classroom presentation.
- Hyperbolic Geometry Using Cabri
- Includes macros for illustrating non-Euclidean geometry in the Poincare disc model.
- The Kepler Conjecture
- Provides historical accounts, proofs, academic papers and other information on the packing of spheres.
- The Lepidoptera of the Circles
- Uses java-enabled applets to illustrate and prove the butterfly theorem.
- The Math Forum: Geometry Research
- Serves as a venue for academics to post research announcements, seminars, reviews and abstracts of papers. Also allows for the discussion of academic papers.
- Mathematical Curves and Surfaces
- A gallery of computer-generated mathematical forms using explicit, parametric, polar, cylindrical or spherical coordinates. Available in French and English.
- Mow's Cabri II
- Collection of geometry data for Cabri Geometry II.
- Native American Geometry
- Provides an in-depth look at ancient geometry which originates from a simple circle. Traces the history of the geometry that led to modern cultural symbols.
- Packomania
- Packings of objects in containers, including circles in a square, circles in a circle, or circles in rectangles. With downloadable source files.
- Peek
- Program for N-dimensional polytope visualization.
- Steiner Surfaces
- Discussion of the geometry of J. Steiner's images of the real projective plane. Includes POV codes for graphics and animation.
- Visual Dictionary of Famous Plane Curves
- Provides information, history, illustration of common geometric curves. Also includes methods of classifying curves.
- Wallpaper Groups
- Provides illustrations and information on different plane symmetry groups.
- Wilson's Inversive Geometry
- Proving theorems using the Klein viewpoint and some CabriJava illustrations.
- Xah Lee's Home Page
- Includes a visual dictionary of famous plane curves, illustration of common surfaces, information on discontinuous groups of rotation and translation in the plane, and projective geometry.
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