Question

Solve the formula for the indicated variable. A = 4πr² for r when r > 0 r =

Answer 1

Answer:

√(A/4π) = r

Step-by-step explanation:

A = 4πr²

r² = A/4π

r = √(A/4π)

Answer 2

Answer:

r = $\sqrt{\frac{A}{4\pi } }$

Step-by-step explanation:

Given

A = 4πr² ( isolate r² by dividing both sides by 4π )

r² = $\frac{A}{4\pi }$

Take the square root of both sides

r = $\sqrt{\frac{A}{4\pi } }$