A bill passed in Indiana in 1897 apparently decided to plump on the value of Pi as 3.2, although various other numbers are suggested.
The Babylonians did better than 4000 years ago with 3.125, the Egyptian with 3.16045 although China seems to have thought it was three.
You can find the Indiana stuff here.
Here's a nice page about the story of Pi and current work on it.
Here's another page on it.
Here's our Hardware Roundup from yesterday.
And here's a piece by Esther Tigre suggesting that the value of Pi can crash your PC. µ
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