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Circumference of Earth With Eratosthenes
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[QUOTE="SteamKing, post: 4492145, member: 301881"] It's very simple. Syene lies due south of Alexandria a distance of 5000 stadia. By measurement of angles at these two locations, Eratosthenes determined that the arc which separates the two cities has a central angle of 7.2 degrees. Eratosthenes wants to determine the circumference of the Earth using these data. To clarify his method, draw a circle and inscribe within two radii which are separated by an angle of 7.2 degrees. (Hint: You are trying to determine the circumference of a circle, not figure out the sides of a triangle.) [/QUOTE]
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Circumference of Earth With Eratosthenes
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