\PGset[0.8em]
\begin{picture}   (20, 12)

%               A    B    C      D      H     E    A
\drawline     (4,1)(1,6)(4,11)(10,11)(13,6)(10,1)(4,1)

\dashline{0.2}(4,1)(4,11)        % AC
\dashline{0.2}(1,6)(1,1)         % BI
\dashline{0.2}(10,11)(10,1)      % DE
\dashline{0.2}(13,6)(13,1)(4,11) % HFC
\dashline{0.4}(4,1)(1,1)(4,11)(19,1)(10,1)  % AICKE

\dashline{0.2}(19,1)(10,11)(13,1)% KDF

\put( 3.9  , 0.2 ){$\scriptstyle A$}
\put( 0.2  , 5.7 ){$\scriptstyle B$}
\put( 3.9  ,11.2 ){$\scriptstyle C$}
\put( 9.3  ,11.2 ){$\scriptstyle D$}
\put( 9.3  , 0.2 ){$\scriptstyle E$}
\put(12.6  , 0.2 ){$\scriptstyle F$}
\put(13.1  , 5.7 ){$\scriptstyle H$}
\put( 0.7  , 0.2 ){$\scriptstyle I$}
\put(19.0  , 0.7 ){$\scriptstyle K$}

\end{picture}

\PGrestore