The perimeter of the parallelogram is 64cm. one of the sides is 20cm. find the rest of the sides.

In order to find the sides of a parallelogram, we will recall the properties of the sides of a rectangle and the formula for finding the perimeter of a rectangle.

So, from the condition it is known that one of the sides of the parallelogram is 20 cm, and its perimeter is 64 cm.

Opposite sides of a parallelogram are equal to each other. That is, the length of one pair of sides is known to us as 20 cm.

Let’s denote by x cm the length of the second side.

P = 2 (a + b);

2 (20 + x) = 64;

20 + x = 64: 2;

20 + x = 32;

x = 32 – 20;

x = 12 cm length of the second pair of sides of the parallelogram.