 
line spiral 

last updated: 20030720 
A line spiral is a spiral composed of right lines.
We distinguish the following forms:
 rectangular Archimedes' spiral
This spiral is the rectangular form of the Archimedes' spiral.
The distance between the windings is the same.
 rectangular equiangular spiral
Construct line pieces rectangular on each other, where the length is a factor a < 1 smaller than the former.
 right equiangular spiral
This curve approximates the equiangular spiral.
