Question

I have the area of a circle but how do i find the radius

Answer 1

Answer:

r = √(A/π)

Substitute area into "A", then solve:

Divide A by π, then find the square root of that number.

Explanation:

With the area of a circle, you can find the radius by rearranging its formula.

Area of a circle: A = πr²

Rearrange the formula to isolate "r".

A = πr²

A/π = πr²/π           Divide both sides by π

A/π = r²                 π divided by π cancels out on the right

√(A/π) = √r²         √ both sides to cancel out ²

√(A/π) = r             Write "r" on the left for standard formatting

r = √(A/π)             Formula for find radius

If you have the area, use this formula.

1. Substitute "A" with the area.
2. Divide A by π
3. Find the square root of that number