The perimeter of the square is 8 cm. Two such squares were used to make a rectangle. Find the area of this rectangle.

The perimeter of a square is calculated using the formula:
P = 4 * a where P is the perimeter and a is the side of the square.
So the side of the square is:
a = P / 4

1) 8: 4 = 2 (cm) side of the square.

The area of the square is calculated by the formula:
Sk = a² = a * a where Sk is the area of the square, and is the side
2) Sk = 2 * 2 = 4 (sq. Cm) square area.

The rectangle was made up of two squares, which means that its area is 2 times the area of one square and is equal to 8 sq. Cm.
3) 4 * 2 = 8 (sq. Cm.) Area of the rectangle.

Answer: 8 sq. Cm.