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We are given area of the ribbon = 144 square inches.
We know formula for side of a square = .
Plugging value of area in the formula, we get
Side of the square
= 12 inches.
Sonya wants to sew ribbon along each side of a square pillow.
So, we need to find the perimeter of the square pillow.
<h3>Perimeter = 4 × side = 4 × 12 = 48 inches.</h3><h3>Therefore, she buy 48 inches of ribbon to have the exact amount that she needs.</h3>