I'm looking for a book about geodesics, curve length, curvature. Preferably something around undergraduate level.
I'm doing a project where we have to show that a simulation we run, plots a geodesic on a sphere. So something that can give me the basics would be a helpful start.
Thanks.
Several of the texts that have been recommended are intended for graduate work. I'll add my own text to the list. For one thing, it's free and immediately downloadable. :) Check sections 1.1, 1.2, and 2.4 (although you'll probably need a bit of notation from earlier sections). By the way, geodesics on the sphere are easy — they're just the great circles. :)