The size of the earth was probably first calculated by Eratosthenes, a Greek living in Egypt, in 250 B.C. Figure 1.7 shows the elements he used in his calculation. How could he have arrived at a circumference of about 40,000 km, not far off from today’s accepted value of 40,077 km, for the equatorial circumference?
Answer to relevant QuestionsHow was it first determined that the earth is not perfectly spherical?-7/16 + 7/8-5/6 + (-2/9)Evaluate 2x squared when x = 5 and when x = -520(8-3) – 4(10-3) divided by 10(2-6) – 2(5+2)
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