# The perimeter of the triangle is 186mm, the length of one side is 42mm, the second side is 2

The perimeter of the triangle is 186mm, the length of one side is 42mm, the second side is 2 times longer from it. Why exactly the third side of the triangle.

Let us determine the length of the second side of the indicated triangle, knowing by the condition of the problem that it is 2 times greater than the length of the first side of the triangle:

42 * 2 = 84.

Let’s determine what the sum of the lengths of the first and second sides of the specified triangle is equal to:

42 + 84 = 126.

Let us determine the length of the third side of this triangle, knowing by the condition of the problem that the perimeter of this triangle is equal to 186 millimeters:

186 – 126 = 60.

Answer: The length of the third side of the indicated triangle is 60 millimeters.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.