What did Eratosthenes measure very accurately?
A)the size of the Earth
B)the length of the year
C)the distance to the Moon
D)the length of the month

Name: What did Eratosthenes measure very accurately? A)the size of the Earth B)the length of the year C)the distance to the Moon D)the length of the month
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Eratosthenes measured the size of the Earth very accurately by observing the angle of the sun's rays at different locations on the same day and using geometry to calculate the Earth's circumference.

What Did Eratosthenes Measure Very Accurately