The area of a circle is given by the formula
a = Pi*r2 (where "a" is the area, and "r" is the radius of the circle. Pi is an irrational number approximated by 3.1416.)
We can solve for r:
a/Pi = r2 (divide both sides by Pi)
√[a/Pi] = r (take the square root of both sides)
√[460/3.1416] = r (plug in the numbers)
√146.42 = r (evaluate)
12.1 = r
Check
Pi*r2 = 460
3.1416*(12.1)2 = 460
3.1416*146.41 = 460 (we note that 146.41 here is not the same as 146.42 above)
459.962 = 460 (We recognize that there is some error. This amount appears to be acceptable and unavoidable, given the precision of the math.)
a = Pi*r2 (where "a" is the area, and "r" is the radius of the circle. Pi is an irrational number approximated by 3.1416.)
We can solve for r:
a/Pi = r2 (divide both sides by Pi)
√[a/Pi] = r (take the square root of both sides)
√[460/3.1416] = r (plug in the numbers)
√146.42 = r (evaluate)
12.1 = r
Check
Pi*r2 = 460
3.1416*(12.1)2 = 460
3.1416*146.41 = 460 (we note that 146.41 here is not the same as 146.42 above)
459.962 = 460 (We recognize that there is some error. This amount appears to be acceptable and unavoidable, given the precision of the math.)