The length of one side of the rectangle is 3.2 cm and the perimeter is 33.2 cm.

The length of one side of the rectangle is 3.2 cm and the perimeter is 33.2 cm. Find the length of the second side of the rectangle.

From the condition it is known that the length of one side of the rectangle is 3.2 cm, and the perimeter is 33.2 cm. In order to find the length of the second side of the rectangle, we compose and solve a linear equation with one variable.

Let’s denote by x cm the length of the second side of the rectangle. Let’s remember the formula for finding the perimeter of a rectangle:

P = 2 (a + b).

Substitute the values and solve the resulting equation:

2 (3.2 + x) = 33.2;

3.2 + x = 33.2: 2;

3.2 + x = 16.6;

We are looking for an unknown term:

x = 16.6 – 3.2;

x = 13.4 cm is the length of the second side of the rectangle.