Discover more at www.ck12.org: http://www.ck12.org/geometry/Distance-Between-Parallel-Lines/.

Here you’ll learn that the shortest distance between two parallel lines is the length of a perpendicular line between them.

This video gives more detail about the mathematical principles presented in Distance Between Parallel Lines.

This is part of CK-12’s Geometry: Parallel and Perpendicular Lines. See more at:

- Parallel and Skew Lines:

http://www.ck12.org/geometry/Parallel-and-Skew-Lines/ -
Perpendicular Lines:

http://www.ck12.org/geometry/Perpendicular-Lines/ -
Corresponding Angles:

http://www.ck12.org/geometry/Corresponding-Angles/ -
Alternate Interior Angles:

http://www.ck12.org/geometry/Alternate-Interior-Angles/ -
Alternate Exterior Angles:

http://www.ck12.org/geometry/Alternate-Exterior-Angles/ -
Same Side Interior Angles:

http://www.ck12.org/geometry/Same-Side-Interior-Angles/ -
Slope in the Coordinate Plane:

http://www.ck12.org/geometry/Slope-in-the-Coordinate-Plane/ -
Parallel Lines in the Coordinate Plane:

http://www.ck12.org/geometry/Parallel-Lines-in-the-Coordinate-Plane/ -
Perpendicular Lines in the Coordinate Plane:

http://www.ck12.org/geometry/Perpendicular-Lines-in-the-Coordinate-Plane/ -
Distance Formula in the Coordinate Plane:

http://www.ck12.org/geometry/Distance-Formula-in-the-Coordinate-Plane/ -
Distance Between Parallel Lines:

http://www.ck12.org/geometry/Distance-Between-Parallel-Lines/

Watch the whole series of CK-12’s Geometry videos: https://www.youtube.com/playlist?list=PLhWx3LZhlpsfZglz0JcMu7AMqcROsISuG

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