I certainly can't answer your question, but can tell you a good place to ask it. <http://tech.groups.yahoo.com/group/Hyacinthos/> is a mail list specializing in triangle geometry, and your question is very much the kind of thing they deal with.
Ken Pledger.
The above group deals with circles too .Is there a group for that ?
I'm interested in the geometry(preferably Euclidean) of solids .This
is unfashionable these days but is there any group for this ?I can't
even find books in the English language for this!
Thanks in advance
Peter