Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!cs.utexas.edu!uunet!mcvax!ukc!warwick!strgh From: strgh@warwick.ac.uk (J E H Shaw) Newsgroups: comp.misc Subject: Re: More on tri vs. bi Keywords: mathematics Message-ID: <3119@sol.warwick.ac.uk> Date: 10 Jul 89 08:35:48 GMT References: <4859@ficc.uu.net> <14266@dartvax.Dartmouth.EDU> Reply-To: strgh@warwick.ac.uk (J E H Shaw) Organization: Computing Services, Warwick University, UK Lines: 8 In article <14266@dartvax.Dartmouth.EDU> mjm@dartmouth.edu (Michael McClennen) writes: >... using only a straightedge and compass! Well, certain angles can >certainly be trisected by this method (60 degrees, for instance), but there >are many angles that cannot. ... > Nitpick: note that 60 degrees is one of the (many!) angles that certainly cannot be trisected using compass and straight-edge; see, for example, `Topics in Algebra' by I.N.Herstein.