Subject: we need help My friends and i have a geometry project and we cannot seem to figure out how to find the arc of a sphere. We have looked everywhere. Thank you for your time. Hi,In our database of questions and answers there is a note called Arclength of a circle that shows how to find the length of an arc on a circle. If your arc on a sphere is an arc on a great circle then the same method will work. If this doesn't answer your question let me know. Harley
