The 6.3 cm side of the triangle is 20.8 cm smaller than the second side and 0.9 cm larger than the third side.

The 6.3 cm side of the triangle is 20.8 cm smaller than the second side and 0.9 cm larger than the third side. Find the perimeter of the triangle.

The solution of the problem:
1. Let’s define what is the second side of the triangle.
6.3 + 20.8 = 27.1 centimeters.
2. Determine what is the third side of the triangle.
6.3-0.9 = 5.4 centimeters.
3. Find the perimeter of this triangle.
6.3 + 27.1 + 5.4 = 38.8 centimeters.
Answer: The perimeter of this triangle is 38.8 centimeters.