In an isosceles triangle with a perimeter of 40 cm. The base is 2 times smaller from the lateral side. Find the sides of the triangle.

It is known from the condition that in an isosceles triangle with a perimeter of 40 cm, the base is 2 times smaller from the lateral side. In order to find the sides of the triangle, we compose and solve the equation.

Let’s denote the base of the triangle with the variable x cm, then the side of the triangle is 2x.

We search for the perimeter of an isosceles triangle by the formula:

P = 2a + b, a is the side and b is the base of the triangle.

2 * 2x + x = 40;

4x + x = 40;

5x = 40;

x = 8 cm base of the triangle, then 8 * 2 = 16 cm sides.