The side of the parallelogram is 12.4 dm, and the other side is four times smaller than the first side.

The side of the parallelogram is 12.4 dm, and the other side is four times smaller than the first side. Find the perimeter of a parallelogram.

It is known from the condition that the side of the parallelogram is 12.4 dm, and its other side is four times smaller than the first side. In order to find the perimeter of a parallelogram, we must first calculate the second side of the parallelogram.

We know that the other side is 4 times smaller than the first side:

12.4: 4 = 3.1 in. Length of the second side of the parallelogram.

Let’s remember and apply the formula for finding the perimeter of a parallelogram:

P = 2 (a + b);

Substitute the lengths of the sides and calculate:

P = 2 (12.4 + 3.1) = 2 * 15.5 = 31 dm.