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Home > CC3 > Chapter 9 > Lesson 9.1.3 > Problem 9-34

9-34.
  1. In each angle problem below, solve for the variable(s). Write the names of the definition(s) and relationship(s) that justify the steps in your solution. Homework Help ✎

  2. a.

    b.

    c.

132 + (2x + 3) = 180

The angle measuring 131° is an exterior angle to the triangle.

d + 131 = 180

d = 49°

d + e + 90 = 180
or
131 = e + 90

e = 41°

An exterior angle is equal to the sum of the remote interior angles.