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Home > CCG > Chapter 8 > Lesson 8.3.1 > Problem 8-97

8-97.

For each diagram below, write and solve an equation to find .

  1. A pentagon with angles of x, x, 125 degrees, 90 degrees, and 125 degrees clockwise.

    The sum of the interior angles .

    sum from Step 1

  1. Transversal line crosses 2 horizontal parallel lines. At the intersection of the top parallel line and the transversal, exterior left is, 6, x + 18 degrees. At the intersection of, the bottom parallel line and the transversal, exterior right is, 2, x + 30 degrees.

    Mark the angles that are vertical to the labeled angles. What do you know about the angles that you marked?