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Home > CC4 > Chapter 10 > Lesson 10.1.4 > Problem 10-69

10-69.
  1. For each diagram below, solve for x. Explain what angle relationship(s) you used. Homework Help ✎

Review the Math Notes box in section 7.1.2

Since the angles of a triangle add up to 180°, set up an equation using all three angles.

x = 60°