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Home > GC > Chapter 9 > Lesson 9.2.1 > Problem 9-60

9-60.

Use the relationships given in the diagram below to write and solve an equation for . Show all work.  

Two increasing parallel lines is cut by a transversal. Where the left parallel line and the transversal intersect, the interior, upper angle is 4, x minus 5 degrees. Where the right parallel line and the transversal intersect, the interior, lower angle is 2, x plus 9 degrees.

How are these angles related? How can you use this relationship to find ?

They are alternate interior angles.