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Picture of the month
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Pi-unrolled-720.gif/360px-Pi-unrolled-720.gif)
Credit: John Reid
Animation of the act of unrolling a circle's circumference, illustrating the ratio π.
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Animation of the act of unrolling a circle's circumference, illustrating the ratio π.
...Archive | Read more... |