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Cartography - Wikipedia (942 words) |
 | The Egyptians later used geometry to survey land and to resurvey it after the periodic flooding of the Nile obscured the property borders. |
| And in approximately 250 BC Eratosthenes of Cyrene estimated the circumference of the earth to within 15% of the modern-day accepted value. |
| Pythagoras of Ionia, who was the founder of a mathematical cult that developed many number-based superstitions that later became the basis of mathematics, was the first notable person to say that the earth was a sphere. |
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