Thread: Spherical Circle Circumference

Suppose I travel r distance away from the north pole and then made a spherical circle at this distance (essentially a line of latitude). How do I figure out the circumference of this spherical circle?

Originally Posted by Janu42

Suppose I travel r distance away from the north pole and then made a spherical circle at this distance (essentially a line of latitude). How do I figure out the circumference of this spherical circle?

Draw a diagram:



is the radius to be used in calculation of the circumference, and:


CB