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The circumference of the earth is roughly 40 thousand kilometers.
by cliveowen 12y ago
The circumference of the earth is roughly 40 thousand kilometers.
- tsenkov 12y agoYep, updated. Sorry for the typo.
- IvyMike 12y agoFun fact: This is easy to remember if you know that the kilometer was originally defined so that the distance from the equator to the poles was 10000 kilometers. https://en.wikipedia.org/wiki/Metre#Meridional_definition https://en.wikipedia.org/wiki/Metre#Meridional_definition
- turnip1979 12y agoNeat. So 10000km = an "arc" from the equator to a pole. If you assume the Earth is a sphere, the circumference at the equator = 4 * 10,000.