The rectangle is made up of 3 identical squares, the sum of the perimeters of which is 36 cm. Find the area of the rectangle.

Find the perimeter of one square:
36: 3 = 12 cm
Since 12 is the perimeter, the side will be 12: 4 = 3
Consider a rectangle, one side of it corresponds to three sides of the squares, the other side is equal to the side of the square.
3 * 3 = 9 cm – 1 side
3 cm – 2 side
S = a * b
S = 9 * 3 = 27cm
Answer: The area of the rectangle is 27 cm