The Greek astronomer who first measured the radius of Earth reasonably accurately was:
A)Archimedes.
B)Eratosthenes.
C)Aristotle.
D)Ptolemy.

Question

Quizplus · Accepted Answer

Eratosthenes is credited with first measuring the radius of Earth with an error of less than 2%. Archimedes was a mathematician and physicist, Aristotle was a philosopher, and Ptolemy was an astronomer and mathematician, but they are not known for accurately measuring Earth's radius.

The Greek Astronomer Who First Measured the Radius of Earth