# The perimeter of a rectangle is 36 cm, the sum of the lengths of its three sides is 25 cm. What is the area of this rectangle?

To find the area of a given rectangle, apply the following formula to calculate it:

S = a * b.

So we have to start by calculating the sides of the rectangle. We know the perimeter of the rectangle – 36 cm.And we also know the sum of the lengths of the three sides of the rectangle – 25 cm.

If we subtract the sum of the lengths of the three sides from the perimeter, we get one of them:

36 – 25 = 11 cm.

Let’s calculate the length of the second side:

2 (11 + b) = 36;

11 + b = 18;

b = 18-11;

b = 7 cm.

It remains to find the area of the rectangle:

S = 7 * 11 = 77 cm2. One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.