How are area and surface area formulas for circles, spheres, oblique and right circular cones, sectors, segments, and other Euclidean shapes developed? Need help finding the area or surface area? The Area Study Guide can help you. For college and high school students and teachers. 53 solved problems. The study guide was produced using MS Word and Windows Paint. If the study guide does not download correctly, or you want to edit as you desire, email your proof of purchase to me at jrgeometry@yahoo.com, and I will email you a correctly formatted study guide.