the area is 144 units.
area is length × width
squares have an equal lenght and width, and 4 sides. if a square's perimeter is 48, we need to divide that by 4 to get the size of each side.
48 ÷ 4 = 12
each side is 12 units. to get the area, we need to mutliple length × width, in this case 12 × 12, which equals 144 units.