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Measuring Earth: Eratosthenes
Grade Level
Astronomy
AST.019 Measuring Earth: Eratosthenes
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A student says, 'I divided the baseline by 360 because there are 360 degrees in a circle.' Which response best corrects the reasoning?
A
Divide 360 by the angle difference, then multiply by the baseline.
B
Ignore the baseline and compare city names instead.
C
Multiply the baseline by the shadow length only.
D
Use 180 degrees because only half of Earth is lit.
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