If the perimeter of a square is 80 cm, then its area is 1. 800 cm 2 2. 600 cm 2 3. 400 cm 2 4. 200 cm 2

By formula, Perimeter of square = 4 × side Substituting values we get, 80 = 4 × side side = = 20 cm. By formula, Area of square = side × side = 20 × 20 = 400 cm 2 . Hence, Option 3 is the correct option.