Date: Nov 13, 1997 7:01 AM
Author: Vladislav Pikovski
Subject: construction of triangle of given perimeter, given  point  and angle

   The construction goes thus: draw a circle that touches both sides
of the angle at distance of P/2 to A (say, in B and C).
Then the line that passes through the point given outside of the
angle and touches the circle (i.e. the segment of it that is contained
in ABC) is the one looked for.