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 |
|2000? B.C.||Babylonians||3.125 (3 1/8)|
|1650? B.C.||Egyptians||3.16045 [4 x (8/9) x (8/9)]|
|550? B.C.||Bible (1 Kings 7:23)||3|
|250? B.C.||Archimedes||3.1418 (ave.)|