1 Answer

Mick Feller · Answer 1 · 2023-10-31T14:54:53+0000

We have first the formula of the circumference of a circle

$C=2\pi r$

In order to know the area we need to know the radius of the circle, it can be obtained using the formula above and the next information.

C=18pi

r is the radius

$18\pi=2\pi r$

then we isolate the r

$\begin{gathered} r=(18\pi)/(2\pi) \\ r=9 \end{gathered}$

the radius is 9 ft

then we can calculate the area using the next formula

$A=\pi r^2$

we substitute the value of the radius

$\begin{gathered} A=\pi(9)^2 \\ A=81\pi ft^2 \\ A=254.47ft^2 \end{gathered}$

Please log in or register to add a comment.