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From: binder@dosadi.DEC (You are what you do when it counts.)
Newsgroups: net.math
Subject: Re: A geometrical construction poser
Message-ID: <1070@decwrl.DEC.COM>
Date: Tue, 11-Feb-86 16:24:36 EST
Article-I.D.: decwrl.1070
Posted: Tue Feb 11 16:24:36 1986
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Many thanks to Lambert Meertens, =Ned=, Mark Brader, and David Moews, who 
provided proofs for my little pentagon problem.  I've not gone through the 
proofs thoroughly yet, but at first glance they look reasonable.  

As a matter of clarification, Lambert, the instructor who supposed the problem
to be unprovable wasn't a mathematician at all - he was an engineering drawing
and descriptive geometry teacher who was retired from the US Army; neither of
these subjects requires much math ability at all, relying as they do on the
use of drafting instruments, and he'd probably forgotten what little math he
knew.  But he was a helluva fine draftsman! 

Cheers,
Dick Binder   (The Stainless Steel Rat)