Area = π*r2
radius = √(area/π)
[the square root of (area divided by π)]
you have to do the division first before you take the square root of that result
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Radius = +sqrt(Area/pi)
the radius is from the center of the circle to the edge so that's how you find the radius.
11.3
Pi x radius(R) squared e.g radius of circle is 5cm A=3.14x5 squared Area is 78.5
The radius is 7 meters.