Determine if lines are Parallel, Intersecting, or Skew

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SelHype
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Does anyone know a decent website that can show me this? Everywhere I go there is not a process for Vector Calculus students.
 
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??Any good Calculus book will have a section on this. It certainly isn't hard. Two lines in 3 space are parallel if their "direction vectors" are parallel (one is a multiple of the other), intersect if it is possible to solve the equations simultaneously, and skew if neither of those is true.