%@Auteur: D'après {\sl trucsmath.free.fr}\par \selectlanguage{english} \begin{myenumerate} \item Find the length of the diagonal of a rectangle measuring 5.7~cm by 17.6~cm. \item The diagonal of a rectangle is 6.7~cm long, and one edge measures 2.3~cm.\\What is the length of the other edge ? \item A ladder is 7 meters long. It leans against a wall with the foot of the ladder 2 meters far from the bottom of the wall. How far up the wall does the ladder reach ? \end{myenumerate} \selectlanguage{frenchb}