What does r^2 mean?

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So to work out the volume of a cylinder you need to do V= pi r^2*h. But what does r^2 mean?

(sorry if it is a dumb question)

Guest Sep 9, 2017

edited by Guest Sep 9, 2017

CPhill · Answer 1 · 2017-09-09T11:53:23

"r^2" means that the radius is "squared"

So, for instance, if the radius is 3, the square is 3^2 = 9