The perimeter of an isosceles triangle is 20 cm, the base is 2 cm larger than the lateral side. Find the lengths of the sides.

An isosceles triangle is a triangle in which two sides are equal. Let the side be x cm, then the base is (x + 2). Knowing that the perimeter is 20 cm, we will create an equation.
2 * x + x + 2 = 20;
We carry out the addition of similar monomials on the left side of the equation.
3x + 2 = 20;
Move the positive number 2 to the right side of the equation by changing the sign to negative.
3x = 20 – 2;
3x = 18;
x = 18/3;
x = 6.
The side is 6 cm and the base is 6 + 2 = 8 cm.
Answer: 6 cm, 6 cm, 8 cm.