Geography, asked by ayesha9178, 7 months ago

how did Eratosthenes calculate the Circumferences of the earth

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Answered by sumit9867

1

Answer:

Eratosthenes then measured the angle of a shadow cast by a stick at noon on the summer solstice in Alexandria, and found it made an angle of about 7.2 degrees, or about 1/50 of a complete circle. He realized that if he knew the distance from Alexandria to Syene, he could easily calculate the circumference of Earth.

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