Parallel Lines - Geometry - Math Review - GMAT Quantitative Review

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