Talk:Geometry for Elementary School/Lines

perhaps clarify on these pages that discussion applies to standard Euclidian/othogonal geometry. Thus, in non-Euclidian(Riemann), points are not connected by straight lines ....--Billymac00 (talk) 21:30, 10 March 2008 (UTC)

Not what I'd call Elementary
The following additions to this book are clearly at odds with the book's intent:

Do elementary students have any idea what a projective n-space is? What about diffemorphic? I don't think so! --Jomegat (talk) 12:44, 6 October 2008 (UTC)

Axiom: there is only a single straight line between two points
People have a gut feeling for what a straight line is, and ANY line drawn on the surface of a sphere is NOT straight by any normal definition. If you start redefining straight to be "shortest distance by pulling some cotton taut between the the two points then only one of the two "curves" in the section is straight. IMO this section is very poor at achieving its objective and needs a complete rewrite for elemntary readers. -- 212.24.70.122 (talk) 14:32, 3 March 2009 (UTC)