The perimeter of the rectangle is 80 cm. Find the sides of the rectangle if one side is 4 cm larger than the other.

A rectangle is a quadrilateral in which all corners are straight.

The perimeter of a rectangle is the sum of the lengths of all sides.

P = (a + b) * 2.

Algebraic method for solving the problem.

The length of one side of the rectangle is x cm,

then the length of the other side of the rectangle is x + 4 cm,

by the condition of the problem, the perimeter of the rectangle is 80 cm.

We get the equation:

(x + x + 4) * 2 = 80;

2 * x + 4 = 80: 2;

2 * x = 40 – 4;

x = 36: 2;

x = 18 (cm) the length of one side of the rectangle;

x + 4 = 18 + 4 = 22 (cm) the length of the other side of the rectangle.

Answer: 18 cm and 22 cm.