Find the radius of this circle.
A = ar2
r = [?] ft
A = 9aft?
![Find the radius of this circle. A = ar2 r = [?] ft A = 9aft? class=](https://us-static.z-dn.net/files/d58/430544531bf7d8c30da71b2ea90b9072.png)
Answer:
A = [tex]\pi[/tex] . r^2
If A = 9[tex]\pi[/tex]ft^2
[tex]\pi[/tex] . r^2 = 9[tex]\pi[/tex]ft^2
r^2 = 9ft^2
r = sqrt(9ft^2)
r = 3ft ( r>0)
Step-by-step explanation: