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This is an early history of Pi, when even the name is not given to this value. So how do they call it? Well, just "a-constant-between-the-ratio-of-a-circle's-diameter-to-its-radius". You might notice that the numbers are to little accuracy, as this value might be only used to estimate a position of an object or there is no people at that time so crazy to find the digits for Pi.
| Before Christ | Long Long Ago | Born of the Geeks | Breakthroughs | Technology |
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2000? B.C. | Babylonians | 3.125 (3 1/8) |
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1650? B.C. | Egyptians | 3.16045 [4 x (8/9) x (8/9)] |
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1200? B.C. | China | 3 |
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550? B.C. | Bible (1 Kings 7:23) | 3 |
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250? B.C. | Archimedes | 3.1418 (ave.) |