3.1. Parallel and Skew Lines http://www.ck12.org
3.1 Parallel and Skew Lines
Here you’ll learn about parallel and skew lines.
What if you were given a pair of lines that never intersect and were asked to describe them? What terminology
would you use? After completing this Concept, you will be able to define the terms parallel line, skew line, and
transversal. You’ll also be able to apply the properties associated with parallel lines.
Watch This
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/52432CK-12 Foundation: Chapter3ParallelandSkewLinesA
Watch the portions of this video dealing with parallel lines.
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/1341James Sousa: Parallel Lines
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/1342James Sousa: Parallel Line Postulate
Guidance
Two or more lines areparallelwhen they lie in the same plane and never intersect. The symbol for parallel is||. To
mark lines parallel, draw arrows(>)on each parallel line. If there are more than one pair of parallel lines, use two
arrows(>>)for the second pair. The two lines below would be labeled
←→
AB||
←→
MNorl||m.