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Home > INT2 > Chapter 1 > Lesson 1.3.4 > Problem 1-110


Use the Triangle Angle Sum Theorem to write an equation and solve for in each diagram below. Show all work.

  1. Triangle with angles x at top left, 80 degrees at bottom, and 40 degrees at upper right.

    There are degrees in every triangle.

  1. Triangle with angles 96 degrees at the top, 2 x at bottom left, and x + 12 degrees at bottom right.

  1. How can you verify that your answer for part (b) is correct?