Eratosthenes, a Greek philosopher measured the Earth’s circumference based on the angle of Sun rays at two different points. Which cities were they?

  1. A. Alexandria and Syene
  2. B. Syene and Troy
  3. C. Alexandria and Troy
  4. D. Alexandria and Thebes

Correct Answer: A. Alexandria and Syene

Explanation

Eratosthenes measured the distance and angle of sun rays between Alexandria and Syene to determine the circumference of Earth.

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