Question 1162397
The owner of this site does not have permission to give your email address
to us, unless you answer in the space below.  Is this your figure?

{{{drawing(3000/13,600,-5,5,-5,21,
rectangle(-4,0,-3.5,.5),locate(4.1,.5,B),

locate(-4.6,.5,A), locate(3,3.3,C),
locate(-4.2,20.6,D),
circle(0,0,.1), locate(0,0,O),

locate(1.8,0,4), locate(-1.94,0,4),
green(line(0,0,2.875,2.781074433)),
locate(2.9,1.7,3),

circle(0,0,4), line(-4,0,-4,19.7765293),line(-4,19.7765293,4,0),
line(-4,0,4,0)  )}}}


Edwin</pre>