A triangle has two sides of the same length, the perimeter of the triangle is 16cm

A triangle has two sides of the same length, the perimeter of the triangle is 16cm, and the third side is 4cm, which is the length of the first and second sides of the triangle.

Let’s find the value of the sum of the first second side of this triangle, for this we need to subtract the value of the length of the third side from the value of the perimeter of this triangle:

16 – 4 = 12 cm is the value of the sum of the first and second sides of this triangle;

We find the length of the first and second sides, since these two sides are equal, we need to divide the value of the sum of the first and second sides by two:

12: 2 = 6 cm is the length of the first and second sides;

Answer: 6 cm is the length of the first and second sides.