The base of the isosceles triangle ABC is 4 cm less than the lateral side.

The base of the isosceles triangle ABC is 4 cm less than the lateral side. the perimeter of triangle ABC is 47 cm. Find the length of the base of the triangle.

An isosceles triangle is a triangle whose sides are equal. The perimeter of a triangle is equal to the sum of its sides.

1. The length of the lateral side of an isosceles triangle is x centimeters.

2. The base of the triangle is equal to (x – 4) centimeters.

3. Let’s compose and solve the equation.

x * 2 + (x – 4) = 47;

2x + x – 4 = 47;

2x + x = 47 + 4;

3x = 51;

x = 51/3;

x = 17;

4. Determine what is the base of an isosceles triangle.

x – 4 = 17 – 4 = 13 centimeters.

Answer: The base of the triangle is thirteen centimeters.