\PGset[0.8em]
\begin{picture}   (14,14 )
\drawline     ( 13,13 )( 1, 1 )(13, 1 )( 13,13 )    %A(D)BC(E)A
\drawline     (  7, 7 )( 13, 4 )              %DE
\dashline[80]{0.2} ( 13, 4 )(  1, 1 )              %EB
\put( 12.5  , 13.2 ){$\scriptstyle A$}   %A
\put( 0.7   ,  0.2 ){$\scriptstyle B$}   %B
\put(13.3   ,  0.7 ){$\scriptstyle C$}   %C
\put( 6.3   ,  7   ){$\scriptstyle D$}   %D
\put(13.3   ,  3.7 ){$\scriptstyle E$}   %E
\end{picture}
\PGrestore