Question

7G4 - H

Janie is cutting a circle of fabric to sew onto her new shirt. Her shirt is
she wants to leave a 1 inch margin on either end of the shirt. Which ex
how much fabric will she need in terms of Pi?
irt is 10 inches wide, and
expression represents

Answer 1

16
`\pi`

Explanation:

1. Find diameter of circle:

If her shirt is 10 inches wide and she wants to leave 1in off of each side, that

means she wants the diameter of her circle to be 8in.

10 - 1 - 1 = 8in

2. Solve for Area:

(Area of circle =
`\<strong>pi r</strong>^(2)`)

To find area we need to find Radius

(Radius = diameter/2)

Radius = 8/2 = 4in

3. Plug radius into equation to get answer:

`4^(2)`
`\pi` = 16
`\pi`