The surface area of a cylinder can be found by breaking it down into three parts:
In the figure above, drag the orange dot to the left as far as it will go.
You can see that the cylinder is made up of two circular disks and a rectangle that is like the label unrolled off a soup can.
While you are here..
... I have a small favor to ask. Over the years we have used advertising to support the site so it can remain free for everyone.
However, advertising revenue is falling and I have always hated the ads. So, would you go to Patreon and become a patron of the site?
When we reach the goal I will remove all advertising from the site.
It only takes a minute and any amount would be greatly appreciated.
Thank you for considering it! – John Page
Become a patron of the site at patreon.com/mathopenref
(C) 2011 Copyright Math Open Reference. All rights reserved