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- A Whale of a Tale - Dive into Math - INNOVA Multimedia Ltd.
Three online math lessons (Addition, Super Sea Sets, Symmetry) for ages 5-9, from INNOVA Multimedia's "A Whale of a Tale" series. Shockwave (required) activities offer ways for children to visualize and manipulate concepts.
- Width, Diameter, and Geometric Inequalities (The Geometry Junkyard) - David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material on width, diameter, and geometric inequalities.
- Wilson A. 'Snowflake' Bentley (1865-1931) - Tobias C. Brown
An American farmer who spent most of his life producing photomicrographs of snowflakes at his Jericho, Vermont farm. The site includes a Snow Crystal Display with a sequence of 26 images.
- Wilson Stothers' Geometry Pages - Wilson Stothers, University of Glasgow
A guide to the various geometry topics on Stothers' pages, including Euclidean, affine, projective, inversive, and hyperbolic geometries, and the Klein View of geometry. These pages began as an experiment in teaching projective conics using Cabri to provide
- Word.Net's Ambigram Website - David Holst
An ambigram is a word or words that can be read in more than one way or from more than a single vantage point, such as both right side up and upside down (from Latin: ambi=both + gram=letter). Read the FAQ or create your own ambigrams online.
- Wordplay - John Langdon
On the application of ambigrams (words as art) in various fields of study. Most ambigrams are based on one form of symmetry or another; most of Langdon's ambigrams exemplify rotational symmetry.
- World of Escher - World of Escher, Inc.
The world of M. C. Escher (1898-1972), the famous Dutch graphic artist most recognized for spatial illusions, impossible buildings, repeating geometric patterns (tessellations), and his incredible techniques in woodcutting and lithography. This site offers
- Yahooligans! School Bell: Math - Yahoo
Yahoo's kids' guide to math sites including topics: Games and Puzzles, Geometry, Homework Help, Just the Facts, Mathematicians, Measurements, and Real World Math.
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