### Home > PC3 > Chapter 2 > Lesson 2.2.2 > Problem 2-66

2-66.

Use

Calculate the exact length of

in terms of.

If

, what is the value of? If , what is the value of? In terms of

, what is the value of? What does this tell you about

? It does not matter what the side length is as long as

. What about

?