## GMAT Quantitative Review

**3.0**** ****Math Review**

**3.3 Geometry**

**4. Parallel Lines**

If two lines that are in the same plane do not intersect, the two lines are *parallel*. In the figure

lines and are parallel, denoted by . If two parallel lines are intersected by a third line, as shown below, then the angle measures are related as indicated, where .