The perimeter of an even triangle is 15.4. Find the base if the side of the triangle is 5.3.

From the condition we know that the perimeter of an isosceles triangle is 15.4. In order to find the base, if the side of the triangle is 5.3, we will compose and solve the equation.

In an isosceles triangle, the sides are equal. And the perimeter of an isosceles triangle can be found using the following formula:

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

Let’s compose and solve the equation, denoting the base of the triangle as x.

2 * 5.3 + x = 15.4;

10.6 + x = 15.4;

x = 15.4 – 10.6;

x = 4.8.

Answer: 4.8 is the base of the triangle.