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Raised in Athens, I was recognized widely for my strong abilities in poetry, astronomy, history, mathematics, and athletics.

Ptolemy III summoned me to Alexandria to tutor his son and be the university's librarian.

An astronomer during the Alexandrian Age, I tried to solve problems that suggested the need for a better understanding of the relationship between chords and angles.

My claim to fame is my "succssful" calculation of the earth's circumference, using a deep well at Syene.

My eponym is a "sieve" for separating prime numbers from the composites.

Answer: Eratosthenes of Cyrene, ca. 276 - 194 B.C.