Enter the formula "=SQRT(Area/PI())" without quotes, replacing "Area" with the actual area measurement, to calculate radius. The resulting units will be the square root of the area unit.

Substitute the value of the radius into the formula for the area of a circle. Multiply π by the square of the radius. This is the same as π × 𝒓 × 𝒓. The formula for the area of a circle ...