Question

If a circle has a diameter of 16 feet which expression gives its area in square feet

Answer 1

Answer:
`(8)^2\pi\ feet^2`

or

`64\pi \ feet ^2`

Explanation:

We are given that the diameter of a circle = 16 feet

Then the radius of the circle =
`r=(d)/(2)=(16)/(2)=\ 8 feet`

Also, the area of a circle is given by :_

`A=\pi r^2` , where r is radius of the circle .

For r = 8 feet

The area of the circle =
`\pi (8)^2=\pi (64)=64\pi \ feet ^2`

Hence, the expression that gives its area in square feet =

`(8)^2\pi \ feet^2`

or

`64\pi \ feet ^2`