The angle formed by lines (intersecting straight lines, non-planar straight lines),
The angle formed by the line and the surface;
The distance from a point to a straight line.
The positional relationship in a vector refers to the translation of the vector,
Parallel (* * * line), vertical,
The included angle of the vector.
This paper mainly discusses the positional relationship of analytic geometry:
Translation, rotation, folding of curves, etc.