You can use this program to check whether any given line is
perpendicular and/or parallel!
Both functions use the same format for defining the lines.
Upgrades for version 1.5:
Instead of just telling you whether two lines are perpendicular/
parallel, it now tells you the slopes of the lines! It features new
user help, and I added an Easter egg.
Upgrades for version 1.4:
Since the original program was not well designed, it was never
released. The new version has no annoying message boxes and
the user interface has been improved. I have also fixed the
field-alignment problem, which would have caused users to be
confused between the x-coordinates and the y-coordinates if
it was released.