Eratosthenes

Eratosthenes

The circumference of the Earth has already been calculated in ancient Egypt. The calculations turned out to be rather accurate, considering the conditions of the time.

02:40

Geography

Keywords

discovery, geometry, Earth, mathematics, sieve, circumference, Egypt, Eratosthenes, geography, nature

On-screen labels

12:00, 21 June, Aswan, Tropic of Cancer, Alexandria, 12:00, 21 June, α*50 =360°, Earth , Sun, a, o, b, 50 days, 1 day, 1 camel, 100 stadion, 50 days*100 stadion = 5000 stadion, 5000 stadion*50 = 250 000 stadion, 157 metres, 250 000 stadion*157 metres = 39 250 000, 39 250 km, 40 075 km
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