Consider the triangle reduction. A larger triangle has side lengths 15.4 centimeters, 15.4 centimeters, and 12.4 centimeters. A smaller triangle has a side length of 3.85 centimeters that corresponds to the sides of the larger triangle with lengths 15.4 centimeters.

The perimeter of the original triangle is 43.2 cm. What is the perimeter of the reduced triangle?

10.8
cm
In the previous problem, you found the perimeter of a reduced triangle. Explain how you found the new perimeter using proportions.