The perimeter of a square is 12 cm. Put two such squares together into a rectangle. How many cm is the perimeter of the rectangle?

The perimeter of a square is 12 cm. Put two such squares together into a rectangle. How many cm is the perimeter of the rectangle?

12 △ 4 = 3 (CM) (3 × 2 + 3) × 2 = 9 × 2 = 18 (CM); answer: the circumference of this rectangle is 18 cm