How to find the sides of an isosceles triangle if the perimeter of 13.6 is known and the base is 2 cm less than the side?

Let’s take the side of the triangle as x. The triangle is isosceles, which means the sides are equal. Then the base of the triangle will be x – 2 cm. The perimeter of the triangle is the sum of all three sides, we know it. Let’s add them up and form an equation.

x + x + x – 2 = 13.6.

3 * x = 13.6 + 2.

3 * x = 15.6.

x = 15.6: 3.

x = 5.2 cm – the sides of the triangle.

5.2 – 2 = 3.2 cm – the base of the triangle.

Answer: 5.2 cm sides, 3.2 cm base of the triangle.