How to Find if Lines Are Parallel, Skewed or Intersecting

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Finding if lines are parallel, skewed or intersecting will require you to look at their slopes. Find if lines are parallel, skewed or intersecting with help from an expert in computers, with two degrees in both Computer Science and Applied Mathematics from the New Jersey Institute of Technology, in this free video clip.

Part of the Video Series: Math Skills
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Video Transcript

Hi, my name is Stefan. Today, I'm going to be speaking on how to find if lines are parallel, skewed or intersecting. Let's say we have the two lines here, we'll call this one A and another line and we'll call this one B and now what I want to do is to check them, I'll drop a perpendicular line here, straight down and then I'm going to examine this angle here. We'll call this theta sub 1 and also this angle here, call this theta sub 2. Now if theta sub 1 is equal to theta sub 2, if equal then you can say that the lines are parallel and if they are not equal, then they are intersecting. And now since these lines keep going on to infinity, we know that they are going to intersect so we know that they are not skewed. And that's how you figure it out.

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