On Tue, 1 Jul 1997, Richard Lawson wrote:

There is, of course, a solution.  However, the teacher said it was also
possible with just three lines:  Just draw a line from where you are to
the north pole, then drop back down to the south pole, then back on up. 

Bzzzzt.  Your teacher was wrong.  Lines do *not* curve, and a line from
the north pole to the south pole would travel via the center of the earth.