proportional segments   3 videos

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  Parametrizing a Line Segment

  Precalculus Vectors and Parametric Equations

  How to write the parametric equations of a line segment that goes from point A to point B.

  vector equation line segment parametric equations
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  The Midpoint and Distance Formulas in 3D

  Precalculus Vectors and Parametric Equations

  How to derive the formula for the midpoint of a segment in three dimensions.

  position vectors the vector from point a to point b the midpoint formula vector addition scalar multiplication
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  The Geometric Representation of Vectors

  Precalculus Vectors and Parametric Equations

  How to understand what vectors are, and how they can be represented geometrically.

  Magnitude Direction Scalar Vector Directed Line Segment Initial Point Terminal Point