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Home > CC4 > Chapter 8 > Lesson 8.2.3 > Problem 8-122

8-122.
  1. Use angle relationships in the diagrams below to solve for x, 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. Homework Help ✎

  2. a.

    b.

    c.

The angles in a triangle sum to 180º.
So, (3x−2º) + (2x + 3º) + (x + 8º) = 180º.

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