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Measuring the Circumference of the Earth

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Author: Annie Fetter
Description: Geometry, difficulty level 3. At our office on the autumnal equinox, the angle formed by the sun's rays and a stick is 40 degrees. If our office is 2749 miles from the equator, what's the circumference of the Earth?
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Problem page: /library/go.html?destination=2727
Support page: Online Resource Page #2727
Solution page: Problem #2727

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