The perimeter of an isosceles triangle is 15.6 cm, its base is 3 cm larger than the lateral side.

The perimeter of an isosceles triangle is 15.6 cm, its base is 3 cm larger than the lateral side. Find the sides of the triangle

The solution of the problem:
Let’s solve the problem using an equation with one unknown.
1. Let’s denote the side of the triangle through x centimeters.
2. Find what the base of the triangle is equal to.
(x + 3) centimeters.
3. Let’s compose and solve the equation:
x + x + (x + 3) = 15.6.
x + x + x + 3 = 15.6.
x + x + x = 15.6-3.
3x = 12.6.
x = 12.6 / 3.
x = 4.2
4. The side of the triangle is x = 4.2 centimeters.
5. The second side is x = 4.2 centimeters.
6. Find what the base of the triangle is equal to.
x + 3 = 4.2 + 3 = 7.2 centimeters.
Answer: The base is 7.2 centimeters, the sides are 4.2 centimeters.