One side of a parallelogram is twice the size of the other. Find the sides if the perimeter is 30 cm.

To find the sides of a parallelogram, we will use the formula to find its perimeter.

Let’s remember her. It is the same as for the perimeter of the rectangle.

P = 2 (a + b);

The condition says that one side of the parallelogram is 2 times larger than the other. The perimeter of the parallelogram is also known; it is 30 cm.

Let x cm be the length of one of the sides, then the other side is 2x cm.

2 (x + 2x) = 30;

x + 2x = 30: 2;

3x = 15;

x = 15: 3;

x = 5 cm is the length of the smaller side and 5 * 2 = 10 cm is the length of the larger side of the parallelogram.