en PortalulTauTV. Geometry Part 2 goes into detail on perimeter, circumference and area for 2-dimensional and 3-dimensional figures. This DVD is also helpful for students who need extra help understanding the Pythagorean Theorem. Difficult concepts are made crystal clear with easy-to-follow examples and graphic presentations. With the Standard Deviants by your side, you'll be calculating the surface of a sphere or the volume of a cylinder in no time!