Circumference of Earth: 40,075 Miles

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The circumference of the Earth is approximately 40,075 miles, and this measurement applies to any great circle, including one that runs through the poles. While the Earth is nearly spherical, there is a slight difference between the equatorial radius and the polar radius, with the equatorial radius being larger. This discrepancy indicates that the Earth is an oblate spheroid rather than a perfect sphere. Understanding these measurements is essential for accurate geographical calculations. The discussion highlights the importance of recognizing the Earth's shape when considering its circumference.
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question:how many miles around the world via the Poles ?

is it circumference of he earth..?
 
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This is not a tutorial so I am moving it- not entirely sure where it belongs but I think I will put it in "Homework- other sciences".

Yes, as far as you can approximate the world by a sphere, any great circle, including through the two poles will have length equal to the circumference of the earth.
 
Although the Earth is close to a perfect sphere, the equatorial raidus (6.38 x 10^6 m) is slightly bigger than the polar radius (6.36 x 10^6 m)
 

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