### Home > GC > Chapter 4 > Lesson 4.1.2 > Problem 4-17

4-17.

The triangles shown at the right are similar.

What is the ratio of side length

to side length

Use a ratio to compare the perimeters of

and . How is the perimeter ratio related to the side length ratio? In part (a), you found that the zoom factor between the two triangles is

.

Now use this information to find the perimeters of each triangle, then find the ratio between them.

If you have not already done so, find the length of

.