### Home > MC2 > Chapter 9 > Lesson 9.3.1 > Problem 9-74

9-74.

The two triangles below are similar.

Find

. Show your**strategy**.Try finding the scale factor between the two corresponding sides that are given and solve for

.Another way to solve for

is to create a proportion.

One possible proportion is shown below.cm What is the scale factor (

)? What is the scale factor between the larger triangle and the smaller triangle? Find the ratio between corresponding sides.

Scale factor matches proportion.

Find the area of each triangle.

Use the formula for area of a triangle: