Proof Without Words: The Circle
Prove πR² using only beads and a ruler! I first saw this proof in an article by Russell Jay Hendel, Dowling College: http://bit.ly/LQlwQw minutephysics is now on Google+ - http://bit.ly/qzE...
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Word on the street has it you'd like to derive the area of a circle. Well, all you need is some chain and a ruler.And it's a visual proof, So I'll stop talking now.
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Word on the street has it you'd like to derive the area of a circle. Well, all you need is some chain and a ruler.And it's a visual proof, So I'll stop talking now.
