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Rouse Ball's Fallacy

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Visit this site: http://www.cut-the-knot.org/Curriculum/Fallacies/GeoFallacy.shtml

Author:Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Description: A famous fallacy by Rouse Ball now implemented in Java. A proof that an obtuse angle is right. How can that be?

Levels: High School (9-12), College
Languages: English
Resource Types: Graphics, Publications, Web Interactive/Java
Math Topics: Euclidean Plane Geometry

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