Question

The area of a circular garden is 121pi

square feet. How much fencing would
be needed to enclose the garden?

Answer 1

1. Use area to find radius.

A = π r^2

121 π = π r^2

2. Divide each side by π.

121 = r^2

3. Take in the square root .

`√(121) = \sqrt{r^(2) }`

11 = r

4. Find the circumference .

C = 2 × π × r

C = 2 × π × 11

C = 22 π ft

Answer 2

22 pi ft

Explanation:

We can use the area to find the radius

A = pi r^2

121 pi = pi r^2

Divide each side by pi

121 = r^2

Take the square root

sqrt(121) = sqrt(r^2)

11= r

Now we need to find the circumference

C = 2*pi*r

C = 2* pi *11

C = 22 pi ft