The sides of the triangle are related as 5: 7: 11. The sum of the larger and smaller sides is 80 cm.

The sides of the triangle are related as 5: 7: 11. The sum of the larger and smaller sides is 80 cm. Find the perimeter of the triangle.

The perimeter of a triangle is equal to the sum of the dimensions of its three sides. To answer the question of the problem, you need to find the value of the third side of the triangle.

1). Let us determine what the sum of the numbers of the larger and smaller sides of the triangle in their relation is equal to.

5 + 11 = 16;

2). Let’s calculate how many centimeters one part is equal to.

80/16 = 5 centimeters.

3). Find what the middle side of the triangle is equal to.

5 * 7 = 35 centimeters.

Let’s answer the question of the problem.

4). Find out what the perimeter of the triangle is.

80 + 35 = 115 centimeters.

Answer: The perimeter of the triangle is 115 centimeters.