### Home > CC2MN > Chapter 4 > Lesson 4.4.2 > Problem 4-140

Find the scale factor between the two corresponding sides that are given and utilize it with the respective sides from triangle to get

*and*

.

The scale factor is

Find

.Find

.Find the ratio of the perimeters of the two triangles.

Find the perimeter of both triangles and compare them as a ratio. What do you notice?

Perimeter (

):

Perimeter ():Can you predict the ratio of the areas of the two triangles? If so, state it. If not, write the information you would need or the question you would need to answer first.

According to the Math Notes box from Lesson 9.2.2:

The

**area ratio**is. Try predicting the area ratio of the two triangles. What do you get?

Triangle is congruent to triangleBased on this, what are the side lengths of triangle. ? What is the measure of angle?Examine the two triangles and the corresponding matching sides or angles to determine each measure.