Question

3) Elliott is using cement circles to

create a walkway from his deck to his
driveway. One circle has an area of
200.96 inches. What is the radius of
one of the circles?

Answer 1

Answer: The radius is 8 inches

Explanation:

The formula for the area of a circle is
`\pi r^2=A`

Where

A is the area (200.96 for this)

`\pi` is pi (we'll round it to 3.14 for this)

and r is the radius

Let's sub in our values and solve for r

`3.14r^2=200.96`

Divide both sides by 3.14 to isolate
`r^2`

`(3.14r^2)/(3.14) =(200.96)/(3.14) \\\\r^2=64`

Take the square root of both sides to cancel the square

`r^2=64\\√(r^2) =√(64) \\r=8`