Circumference of Earth: 40,075 Miles

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SUMMARY

The circumference of the Earth is approximately 40,075 miles, which is the distance around the planet measured along a great circle that includes the poles. While the Earth closely resembles a perfect sphere, it is slightly oblate, with an equatorial radius of 6.38 x 106 meters and a polar radius of 6.36 x 106 meters. This difference in radius contributes to the slight variation in measurements depending on the path taken around the Earth.

PREREQUISITES
  • Understanding of basic geometry and spherical shapes
  • Familiarity with Earth's physical dimensions
  • Knowledge of great circles in navigation
  • Basic concepts of geodesy
NEXT STEPS
  • Research the effects of Earth's oblateness on satellite orbits
  • Learn about geodesic calculations for navigation
  • Explore the differences between equatorial and polar measurements
  • Investigate the historical methods used to measure the Earth's circumference
USEFUL FOR

Students studying geography, geodesy professionals, and anyone interested in Earth's physical properties and measurements.

prabhjyot
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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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