Pythagorean Droodle:

An Analog Device for a demonstration of the ... Theorem

Here's an interesting analog gadget that physically demonstrates (but does not prove) a famous theorem. What is it? (It could be a great project for a math fair.)

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This applet requires Sun's Java VM 2 which your browser may perceive as a popup. Which it is not. If you want to see the applet work, visit Sun's website at http://www.java.com/en/download/index.jsp, download and install Java VM and enjoy the applet.

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Explanation

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