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Home > GC > Chapter 9 > Lesson 9.1.2 > Problem 9-22

9-22.

For each geometric relationship represented below, write and solve an equation for . Show all work.  

What is the sum of the interior angles of a pentagon?
How can you use this to find ?

, because

What is the relationship between these two angles?
Is there an angle that both have a geometric relationship to?