The perimeter of the triangle is 167cm. Its two sides are 65cm long. Find the length of the third side of this triangle.

1. The perimeter of a triangle is equal to: P = a + b + c, where P is the perimeter, a, b, c are the sides of the triangle.

2. According to the problem statement, we know that the perimeter of the triangle is 167 cm. We also know that the two sides of the triangle are 65 cm long. Substitute the values we have in the formula and find out what the third side of the triangle is.

167 = 65 + 65 + s;

167 – 130 = s;

c = 37 cm.

Answer: The third side of the triangle is 37 cm.