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Tool: The Altitude Theorem for Equilateral Triangles
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Go to: http://www.math.duke.edu/.../project (opens a new window)
Description: Intrigue students with a surprising property of equilateral triangles, stimulate their curiosity to wonder why the property is true, then lead them to understand how the property can be proven in an unexpected way. Offers extension questions, including the Broken Stick problem. Multi-page project with related applets on three of the pages.
Technology Type: Java Applet 
Authors: Jason Bershatsky
Mary Ann Buckley
Charles Oelsner
Dan Morley
Language: English 
Cost: Does not require payment for use

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Courses: Geometry Equilateral, Centers of triangles