One side of the triangle is 4 cm, and the other is 5 cm larger than it. The third side is 2 cm smaller

One side of the triangle is 4 cm, and the other is 5 cm larger than it. The third side is 2 cm smaller than the second. Find the perimeter of the triangle.

We will solve this task in steps and explain each of them in detail.
1) 4 + 5 = 9 centimeters – the length of the second side of the triangle, since it is 5 centimeters longer than the first side, and the length of the first side is 4 centimeters;
2) 9 – 2 = 7 centimeters – the length of the third side, since it is 2 centimeters less than the length of the second side, and the length of the second side is 9 centimeters;
3) 4 + 9 + 7 = 13 + 7 = 20 centimeters – the perimeter of a triangle with sides of 4 centimeters, 9 centimeters and 7 centimeters.
Answer: 20 centimeters.