Find the circumference.
Use 3.14 for n.
r = 3 ft
C = [?] ft
Crīd

Step-by-step explanation:
the area of circle is πr² and we use this formule on your question that.
use 3,14 from π and multiple by 9 because the "r" is 3 the answer is 9*(3,14)=~ 28,06