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Home > CCG > Chapter 2 > Lesson 2.3.2 > Problem 2-116


Use the relationships in the diagrams below to solve for , if possible. If it is not possible, state how you know. If it is possible, justify your solution by stating which geometric relationships you use.   

  1. The angles in a triangle sum to .
    So, .

  1. How can you use the parallel lines to find an angle within the triangle?