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Cornell University: Astronomy: Eratosthenes and Circumference

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This site, which is provided for by the Cornell University, gives a description of how Eratosthenes used geometry to measure the circumference of the earth.

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Classroom Considerations
  • Knovation Readability Score: 4 (1 low difficulty, 5 high difficulty)
  • This resource is only available on an unencrypted HTTP website.It should be fine for general use, but don’t use it to share any personally identifiable information