%@Auteur:Arnaud Gazagnes\par \def\PB{\pscircle*(0,0){0.15}} \newcommand\BR[7]{\psset{unit=0.75cm}\begin{pspicture}(2,4) \rput(0.5,3.5){#1} \rput(1.5,3.5){#2} \rput(0.5,2.5){#3} \rput(1.5,2.5){#4} \rput(0.5,1.5){#5} \rput(1.5,1.5){#6} \rput(1,0.5){$#7$}\end{pspicture}} Voici quelques lettres de l'alphabet Braille. Pour celles qui poss\`edent des \'el\'ements de sym\'etrie, marque en vert le centre de sym\'etrie et en bleu le(s) axe(s) de sym\'etrie. \begin{multicols}{7} \begin{center} \BR{\PB}{}{\PB}{}{}{}{b}\\ \BR{\PB}{\PB}{}{}{}{}{c}\\ \BR{\PB}{\PB}{\PB}{}{}{}{d}\\ \BR{\PB}{}{\PB}{}{\PB}{}{l}\\ \BR{}{\PB}{\PB}{\PB}{\PB}{}{t}\\ \BR{\PB}{\PB}{}{}{\PB}{\PB}{x}\\ \BR{\PB}{\PB}{}{\PB}{\PB}{\PB}{y}\\ \end{center} \end{multicols}