Question

Find the circumference and the area of a circle with a radius of 9 feet

Answer 1

Circumference of a circle:

`C=2\cdot\pi\cdot r`

Area of a circle:

`A=\pi\cdot r^2`

For the given circle:

`\begin{gathered} r=9ft \\ \\ C=2\cdot3.14\cdot9ft \\ C=56.52ft \\ \\ A=3.14\cdot(9ft)^2 \\ A=3.14(81ft^2) \\ A=254.34ft^2 \end{gathered}`Then, the circumference is 56.52 feet and the area is 254.34 square feet