The perimeter of the isosceles of the triangle is 78 cm and the side is 0.8 base, find the sides.

In order to find the sides of an isosceles triangle, we will use the formula for finding the perimeter of a triangle to compose and solve the equation.

Let’s take a look at the condition. It states that the perimeter of the triangle is 78 cm and the side is 0.8 from the base.

Let’s denote by x cm the length of the base, then 0.8x is the length of the side.

P = 2a + b is the perimeter of an isosceles triangle.

2 * 0.8x + x = 78;

1.6x + x = 78;

x (1.6 + 1) = 78;

2.6x = 78;

x = 78: 2.6;

x = 30 cm base length and 30 * 0.8 = 24 cm side length.