### Home > PC > Chapter 3 > Lesson 3.3.2 > Problem 3-128

3-128.

Using

Review problems 3-74 and 3-112.

Find the length of

in terms of .Find

. Find

. What is the measure of

? Since

always cancels in parts (b) and (c), what can you conclude aboutand ? The ratios do not depend on the value of

, so they will always be the same as those found in (b) and (c).