HPPD                                                       Menu: (HELPL) ADHLP
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Creates a help-line perpendicular to a line at a specified distance from its
first point.

         1.      (NUM) distance of intersection (other than 0)
         2.*     (POINT) first point
         3.*     (POINT) second point

Description

This command creates a help-line perpendicular to a line, at a specified
distance from its first point.  Enter the distance of the intersection from
the first point.  Pick the two end points of the line.  (You may specify the
"line" by picking any two points.)

You are prompted for additional pairs of points until you enter another command.
