Question

I’m lost on how to make r the subject for this equation

Answer 1

Explanation:

A = πr²

Dividing by π

A/π = r²

Finding the square root of both side

√r² = √(A/π)

r = √(A/π)

Answer 2

Explanation:

A = πr²

r²= Aπ

r= √Aπ