correct then it appears to be a good approximation based on their available knowledge.
A believe there was a 3% error even in the 17th century.
In real life nothing ever works out correct to five or ten decimal points. Remember,
they lacked access to computers and modern technology and knowledge.
I think you need to go back and recheck your math CK. A 5% error in an equatorial radius of 40,075.02 kilometers is 2003.75 kilometers for a revised size of 38,071.27 kilometers. The equatorial diameter of Earth is 12,756.2 kilometers. There's nothing "pretty close" about the two.
Edited by cormac mac airt, 16 June 2013 - 01:10 AM.