A rectangle chair cushion measures 14 inches long, 12 inches wide, and 3 inches high. How many square inches of fabric would you need to cover a cushion

To cover the entirety of the cushion, we will have to cover all 6 sides of the cushion. We are looking for the surface area of the cushion.

The top:

12 x 14 = 168in^2

The bottom:

12 x 14 = 168in^2

The 2 long sides:

14 x 3 = 42in^2 (each)

The 2 short sides:

12 x 3 = 36in^2 (each)

If we add up all of the areas:

168 + 168 + 42 + 42 + 36 + 36 = 492in^2

Therefore we will need 492 square inches of fabric to cover the cushion.