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Visit this site: http://www.navworld.com/

Author:Joseph Portney
Description: A center for the art and science of navigation, providing navigational "cerebrations," famous historical accounts, interviews and biographies. See Earthshapes, different ideas of what the earth would look like if it were one of 12 different shapes (physical properties such as volume, area, shortest distance and conformance to Euler's theorem are also featured). Learn about the history of navigation and Eratosthenes' measurement of the earth with a walk through a Time Tunnel; test and score your skills with high-powered teasers and monthly Brain Games; and explore other worlds on the Web (science links). (A Shockwave version is available via the home page.)

Levels: High School (9-12)
Languages: English
Resource Types: Problems/Puzzles
Math Topics: Higher-Dimensional Geometry, Euclidean Plane Geometry, Elliptic & Spherical Geometry, Hyperbolic Geometry, Geography

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