Examples+of+Online+Math

I found LaTeX useful for presenting a solution in the [|Math Problem Solving] group on Mathematics24x7, in the question [|largest semicircle inscribable in a unit square]. The same question, asked in "[|maxima & minima]" (2 pages) on an Orkut.com [|mathematics] community, shows the limitations of a text only forum for discussing math.
 * Largest Semicircle Inscribable in a Unit Square**

Bob demonstrates that WikiSpaces has LaTeX capability, on his wiki at http://afwings.wikispaces.com/
 * Testing Math Markup**