The perimeter of an isosceles triangle is 12cm 5mm. The base is 2cm larger than the lateral side. Find the sides of the triangle.

We translate centimeters into millimeters, we get that the perimeter will be equal to 125 millimeters, the base will be 20 millimeters larger.

The solution of the problem:

Since in an isosceles triangle the sides are equal, the side side will be equal to x millimeters, then x + 20 is the base, then we make the equation:

x + 20 + x + x = 125;

3x = 105;

x = 35;

therefore, the side will be 35 centimeters, and the base will be 35 + 20 = 55 centimeters.

Answer: the sides will be 35 centimeters, and the base 55 centimeters.