Find the area of a rectangle if one of its sides is 19 cm and the perimeter is 122 cm.

In order to find the area of a rectangle, first determine the value of its second side from the perimeter.

Since the perimeter is twice the sum of the sides of the shape, the sum of the length and width will be:

122/2 = 61 cm.

We find the second side.

We subtract the length of the first side from the obtained value.

Will be:

61 – 19 = 42 cm.

Find the area of the figure using the following formula:

S = a * b,

Where:

S – area;

a – length;

b – width.

As a result, it will be:

S = 61 * 19 = 1159 cm ^ 2.

Answer: The area of the rectangle is 115 cm ^ 2.