The area of a square television screen with the 16-inch side is 256 square inches. The area of the square is A = s^2, where A is the area of the square and s is its side. If we know that the side is 16-inch (s = 16 inches), we need to substitute it in the formula for the area: A = (16 inches)^2 = 256 square inches. So 256 square inches would be the answer. ☺