Step-by-step explanation:
A=3.14r^2
Answer:
[tex]\sqrt{\frac{A}{3.14} } =r[/tex]
[tex]A=3.14r^2\\[/tex]
Divide both sides by 3.14.
[tex]\frac{A}{3.14}=r^{2}[/tex]
To remove the square put root on both sides.
