radius = square root of (200.96/pi).
Divide the 81 pi by pi, then square root it. (Use the formula for area of circle, which gives 81pi=pi*radius squared, but rearrange to find the radius). i.e. it's the square root of 81
the formula for the area of a circle is pi times r squared (sorry this website does not work today for presenting this better) so 2826 = pi times r squared so dividing through on both sides bi pi gives you: 2826 divided by pi = r squared so r is the square root of (2826/ pi) 2826/pi = 899.5437384 so r is the square root of 899.5437384 = 29.99239468 r = 29.99 (to 2 decimal places)
The area is equal to pi times the radius squared, so dividing both sides by pi and taking the square root of both sides, we get that the radius is equal to the square root of 225/pi, or about 8.463.
Area = pi * (radius^2) Where (radius^2) is radius squared, or radius to the second power. do some algebraic steps: Area / pi = radius^2 radius^2 = Area / pi square root (radius^2) = square root (Area / pi) radius = (plus or minus) square root (Area / pi) If you are not working with imaginary numbers then radius = square root (Area / pi)
cube root (pi) = 1.46459189.
The square root of pi times pi is simply pi. Because pi*pi=pi squared, the squared and the square root will cancel each other, leaving just pi.
1.46459189
Square root of Pi is about 1.772
The cubed root of 726 is 9. 9 squared is 81
The cube root of 729 is 9 and 9 squared is 81.
The cube root of 343 is 7.7 squared is 49.
The answer is 25.
81
64
2.080084
~18.721