The perimeter of the triangle is 6. The sides are 1: 2: 3. What is the length of its middle side?

The perimeter of a triangle is equal to the sum of its three sides. Let’s solve the problem using the equation, where:

1x – the smaller side of the triangle;

2x – middle side of the triangle;

3x is the large side of the triangle.

Let’s compose and solve the perimeter equation:

1x + 2x + 3x = 6;

6x = 6;

x = 6/6;

x = 1;

2x = 2 * 1 = 2 – the middle side of the triangle.

Answer: 2.