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Archimedes found a method for finding good approximations to the ration of the circumference of a circle to the diameter. He did this by inscribing polygons inside the circle and finding how the perimeter changes when the number of sides is doubled.
Archimedes came up with an approximation that is equivalent to saying that pi is between 3 1/7 and 3 10/71. This is quite far from being as accurate as what you showed.
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Who made the earliest reference to pi?
Archimedes
Who found out pi?
Pi was first computed by the Greek philosopher and mathematician Archimedes.
Which mathematicians first used the symbol pi?
Archimedes
When did Archimedes establish the value of Pi?
287-212 bce
How did Archimedes think about the value of pi and how did they use pi?
3 1/7 and 3 10/71
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