find the area of a circle with a diameter of 22 inches?

[tex]R=\frac{Diameter}{2}[/tex]then[tex]R=\frac{22~in}{2}[/tex][tex]\boxed{R=11~in}[/tex]now we just need to apply this formula[tex]S=\pi*R^2[/tex][tex]S=\pi*11^2[/tex][tex]\boxed{\boxed{S=121*\pi~in^2}}[/tex]

[tex]d=2r\\
d=22\\
2r=22\\
r=11\ inches\\
\\
A=\pi r^2\\
A=\pi \cdot 11^2=3,14 \cdot 121=379,94\ inch^2[/tex]