The base of an isosceles triangle is 16.3 cm. Find the other sides of the triangle if its perimeter is 40.5 cm.

An isosceles triangle is characterized by the same lateral sides and the same angles at the base. The perimeter of any triangle is found by adding all its sides. Let us express the unknown side of the isosceles triangle with the letter x, compose and solve the equation corresponding to the rule for calculating the perimeter:

x + x + 16.3 = 40.5 cm;

2 x + 16.3 = 40.5;

2x = 40.5 – 16.3;

2x = 24.2;

x = 24.2 / 2;

x = 12.1 cm – the side of the triangle.

Answer: the sides of an isosceles triangle are 12.1 cm.