What is the shortest distance between two points on the surface of earth?

Great Circle refers to shortest distance between two points on the surface of earth. A great circle, also known as a Riemannian circle, of a sphere is the intersection of the sphere and a plane which passes through the center point of the sphere, as distinct from a small circle. Any diameter of any great circle coincides with a diameter of the sphere, and therefore all great circles have the same circumference as each other, and have the same center as the sphere. For any two points on the surface of a sphere there is a great circle through the two points.

Surface Of Earth View