The perimeter of the square is 20 cm. How many square centimeters will the square’s area

The perimeter of the square is 20 cm. How many square centimeters will the square’s area increase if its perimeter increases by 12 cm.

1) 20: 4 = 5 (cm) – side of the starting square;

2) 5 * 5 = 25 (sq. Cm) – the area of the initial square;

3) 20 + 12 = 32 (cm) – the perimeter of the new square;

4) 32: 4 = 8 (cm) – side of the new square;

5) 8 * 8 = 64 (sq. Cm) – the area of the new square;

6) 64 – 25 = 39 (sq. Cm)

Answer: the area of the square will increase by 39 square centimeters.