# One of the sides of the parallelogram is 3 times smaller than the other, and its perimeter is 72 cm

**One of the sides of the parallelogram is 3 times smaller than the other, and its perimeter is 72 cm. Find the sides of the parallelogram.**

Let X centimeters be one of the sides of the parallelogram. Then the other side of the parallelogram is 3X centimeters (since it is 3 times larger). It is known that the perimeter of a parallelogram is 72 centimeters.

The perimeter is the sum of all sides of the parallelogram. From this statement we obtain the formula:

P = a + a + b + b = 2a + 2b = 2 * (a + b).

Where P is the perimeter; a and b are the sides of the parallelogram.

Let’s find the sides of this parallelogram:

72 = 2 * (X + 3X) = 2 * 4X;

4X = 72: 2;

4X = 36;

X = 36: 4;

X = 9.

Thus, one of the sides of the parallelogram is 9 centimeters.

Let’s find the other side of the parallelogram:

9 * 3 = 27 (centimeters) – the second side of the parallelogram.

Since in a parallelogram the two opposite sides are equal and parallel, in this parallelogram the sides are: 9 and 9; 27 and 27.

Answer: 9; nine; 27; 27.