Newsgroups:     sci.math
From:           feng-thomas@CS.YALE.EDU (Thomas Zuwei Feng)
Subject:        construct a pentagon
Organization:   Yale University Computer Science Dept., New Haven, CT 06520-2158
Date:           Fri, 15 May 1992 18:20:10 GMT

Call a pentagon 'parallel' if every diagonal is parallel to its opposite side.
e.g., for ABCDE, AB // EC, etc.
Now, given three of the vertices, say A, B, C, construct the points D and E, 
so that ABCDE is a parallel pentagon.

I did this by first constructing a regular pentagon, and then applying some
linear transformations, but I'd like to see an elegant solution.

Thomas Zuwei Feng                 PO Box 3207 Yale Station, New Haven, CT 06520                 328 Humphrey Street, New Haven.  203-624-0205
Quand on cherche, on trouve.          What do YOU care what other people think?