Sonya wants to sew ribbon along each side of a square pillow. if the pillow has an area of 144 square inches, how much ribbon must she buy to have the exact amount that she needs?

We know that the pillow is a square with an area of 144. This means that all the side lengths must be the same. If we take the square root of 144 we get 12 which is the length of one side of the square. Because there are four sides to a square, we multiply this by 4. So 12 x 4 = 48 inches of ribbon.

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