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Forum URL: http://www.cut-the-knot.org/cgi-bin/dcforum/forumctk.cgi
Forum Name: High school
Topic ID: 168
Message ID: 0
#0, geometry
Posted by sid1983 on May-13-02 at 09:31 PM
can someone give an elementary proof of the "BUTTERFLY THEOREM"
for a general conic?