The perimeter of the rectangle is 50 dm, and the length of one of its sides is 15 dm. Find the lengths

The perimeter of the rectangle is 50 dm, and the length of one of its sides is 15 dm. Find the lengths of all other sides of the rectangle.

It is known from the condition that the perimeter of the rectangle is 50 dm, and the length of one of its sides is 15 dm. In order to find the lengths of all other sides of the rectangle, compose and solve the equation.

Let’s denote with the variable x dm the length of the second side of the rectangle.

Let’s recall the formula for finding the perimeter of a rectangle:

P = 2 (a + b);

Substitute the known values and solve the equation:

2 (15 + x) = 50;

15 + x = 50: 2;

15 + x = 25;

x = 25 – 15;

x = 10 dm is the length of the second side of the rectangle.

Answer: 15 dm; 15 dm; 10 dm; 10 dm.