Mathematics tools

Hello AL, Hi mauno,

Thanks buddies for your help and answers.

I am using Mooodle 2.3.1 on a centOS server of my provider.
I am not aware about the Tex software he installed.
Following mauno, I tried some other latex commands and found out that xy-pic commands for graphs like \xymatrix seem working even if the output figures
are not correctly displayed in the browser as I should scroll far to the right to see them

I am yet looking to find which xy commands would render geometric figures: cicles, triangles, angles....

Again thanks for your help

K. Bahloul