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How is circular surface area values square rooted ??. I am using this formula r^{2}Xπ=mm2 to calculate the surface area of a circle but i want to know if there is a formula to get back to the diameter or the radius of the circle ?.

example i have a circular surface area of 5.26mm2 and i want the diameter of that value, how do i solve this ?

Thanks in advance

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# Circle surface area

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