# Solids of revolutions and their volumes?

I am currently self-teaching myself some calculus stuff and I am a bit confused about all these methods to find the volumes given a function rotated along the $y$- or $x$-axis? So far I have come across so many videos with different method names which is what confuses me.

Is the Ring Method = Washer = Disc method? I know there is also the shell method, but other than that are there only two methods to finding the volume?

• There are two basic methods. Here's an exercise for you: take the disk of unit radius centered at $(1,1)$, and rotate it against whichever axis you like. What are the volume and surface area of the figure thus obtained ? – Lucian Feb 7 '15 at 7:36
• A washer is just a disk with a concentric hole. It's basically the same method. – David K Mar 9 '15 at 5:48