7. Vectors

7.01 Introducing Vectors in 3D

7.02 Finding the length of a Vector / Finding the distance between two points in 3D

7.03 Finding the Vector Equation of a Line

7.04a Introducing Lines that Intersect, are Parallel or are Skew

7.04b Show two Lines Intersect and find the point of intersection

7.04c Show two Lines are Skew Lines

7.04d Show two Lines are Parallel

7.05a The Scalar Product (Dot Product) / How to find the angle between two lines

7.05b When the Scalar Product is Zero / Show two Lines are Perpendicular

7.06a Finding the Coordinates of the Foot of the Perpendicular from a Point to a Line

7.06b Finding the Shortest Distance from a Point to a Line