Step-by-step explanation:
diameter i.e. d = 12ft
radius i.e r= 6ft
Area of the circle is given by,
[tex]\pi {r}^{2} = 3.14 \times {(6)}^{2} [/tex]
[tex] = 3.14 \times 36 = 113.04 \: \: {ft}^{2} [/tex]