In this lesson we will learn what a prism is and the meaning of the term cross sectional area (C/S area). Rob uses different 3 Dimensional cakes and shapes to teach this lesson in a unique and fun way. We will also learn the formula for calculating the volume of any prism and all of the different shapes that are prisms. This lesson will make finding the volume of most shapes very easy. But again this lesson was just an excuse for Rob to eat his favorite cakes.