Find the indicated measure: Radius, A=84ft^2

Question

anonymous · Answer

Are you sure there isn't a $$\pi$$ in your answer?

anonymous · Answer

im suppose to find the radius. the area = 84ft^2

anonymous · Answer

What class are you in?  This comes out to be a very strange number so I am wondering what type of answer you are looking for.

anonymous · Answer

Geometry

anonymous · Answer

Well.. if you are sure that all it says is Area = 84ft^2 and you are to find the radius.  The formula is A = "pi"r^2.  (sorry, I don't know how to get the pi symbol).
So 84 = "pi"r^2..  so in a calculator take 84/"pi" if you have the "pi" key or maybe your teacher wants you to use 3.14 for pi.  If so take 84/3.14  The idea is to get r^2 by itself so you divide by "pi".  Then you get about 26.73  So 26.73 = r^2.  The way you get r by itself is to square root both sides.  If you do you get about 5.17 feet for the raidus

anonymous · Answer

ok thank u