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.

Let x be the side of the triangle, then (x + 3) is the base of the triangle. The perimeter of a triangle is 15.6 cm. The perimeter of a triangle is equal to the sum of all its sides.

Let’s make the equation:

x + x + (x + 3) = 15.6

3 x + 3 = 15.6

3 x = 15.6 – 3

3 x = 12.6

x = 12.6 / 3

x = 4.2

4.2 cm is the side of the triangle

Answer: The side of the triangle is 4.2 centimeters.