Biography of Eratosthenes, Greek Mathematician and Geographer
Biography of Eratosthenes, Greek Mathematician and Geographer
Jul 3, 2019
thoughtco.com
Who is Eratosthenes? Life, Biography & Discoveries of Eratosthenes
Who is Eratosthenes? Life, Biography & Discoveries of Eratos…
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Eratosthenes Biography | Pantheon
Eratosthenes Biography | Pantheon
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pantheon.world
Eratosthenes
Eratosthenes
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worldhistory.org
Eratosthenes (276-195 BC)
Eratosthenes (276-195 BC)
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3.3K views · 98 reactions | Over 2,000 years ago, Eratosthenes proved...
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Eratosthenes, a Greek mathematician, was the first to calculate the Earth’s circumference with remarkable accuracy over 2,000 years ago using a simple yet brilliant method. He observed that at noon in Syene (modern-day Aswan, Egypt), the Sun was directly overhead and cast no shadow, while at the same time in Alexandria, a shadow formed at an angle of about 7.2 degrees. Realizing that this angle represented 1/50th of a full circle and assuming the Sun’s rays were parallel and the Earth was spheri
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