Question

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

Answer 1

`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`

Answer 2

`R=(Diameter)/(2)`

then


`R=(22~in)/(2)`


`\boxed{R=11~in}`

now we just need to apply this formula


`S=\pi*R^2`


`S=\pi*11^2`


`\boxed{\boxed{S=121*\pi~in^2}}`