Systerms : system terms : Eratosthenes

A (14) | B (13) | C (18) | D (12) | E (7) | F (17) | G (6) | H (8) | I (5) | J (2) | K (2) | L (2) | M (10) | N (4) | O (2) | P (20) | Q (2) | R (16) | S (30) | T (9) | U (8) | V (5) | W (6) | X (1) | Y (1) | Z (1) | Π (1) | Φ (1)

Eratosthenes (circa 275–194 BC) was a famous Greek mathematician, astronomer, and geographer, born in Cyrene, Libya. His most celebrated achievement was pioneering a method for measuring the Earth's circumference, calculating a result with less than 5% error, and he was the first to propose the term 'geography,' earning him the title of 'Father of Geography' in later generations.

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