Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: How big is the world

  1. Aug 12, 2006 #1
    question:how many miles around the world via the Poles ?

    is it circumference of he earth..?
     
  2. jcsd
  3. Aug 12, 2006 #2

    HallsofIvy

    User Avatar
    Science Advisor

    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.
     
  4. Aug 12, 2006 #3
    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)
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook