Well, we could think of disks, but instead of thinking of disks, we're gonna think about washers now, which is essentially the exact same thing we did in the last video mathematically, but it's a slightly different way of conceptualizing it. So imagine taking a little chunk between these two functions just like that. What is going to be the width of this chunk? Well, it's going to be equal to dx, and let's rotate that whole thing around the x-axis. So if we rotate this thing around the x-axis, we end up with a washer. That's why we're gonna call this the washer method. It's really just kind of the disk method where you're gutting out the inside of a disk.