Overview: Disks vs Washers vs Shells

Hold your horses, we're not quite to the formulas yet. This video is another overview one where we'll introduce the three shapes we'll be using. It seems like most students get the hang of what disk and washer are about, but you'll definitely want to watch this if you're one of the 99% who have no clue why the heck a tube is called a shell, and how they'd help you with a volume problem.