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In this post, we’ll evaluation the methods and also occupational out a variety of instance troubles. By the end, you’ll be prepared for any disk and also washer approaches problems you enrespond to on the AP Calculus AB/BC exam!## Solids of Revolution

The disk and washer methods are specialized devices for finding quantities of certain kinds of solids — **solids of revolution**. So what is a solid of revolution?

Starting through a level region of the plane, geneprice the solid that would certainly be “brushed up out” as that area revolves about a addressed axis.

For instance, if you begin with a appropriate triangle, and also then revolve it approximately a vertical axis via its upright leg, then you gain a cone.

About Shaun Ault Shaun earned his Ph. D. in math from The Ohio State University in 2008 (Go Bucks!!).

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He got his BA in Mathematics via a minor in computer system scientific research from Oberlin College in 2002. In addition, Shaun earned a B. Mus. from the Oberlin Conservatory in the same year, via a significant in music complace. Shaun still loves music -- practically as much as math! -- and he (thinks he) deserve to play piano, guitar, and bass. Shaun has actually taught and also tutored students in math for about a decade, and hopes his endure have the right to assist you to succeed!