\PGset[0.8em]
\begin{picture}(8,6)

\dashline[80]{0.2}(3.5,6.7)(1,6.7)(5.2,5) % AEB
\drawline(3.5,6.7)(6.9,6.7) % AC

\dashline[80]{0.4}(3.5,6.7)(5.2,5)(6.9,6.7)(4.9,8.7) % ABCD
\dashline[80]{0.4}(5.5,8.7)(3.5,6.7) % DA

\put( 2.9, 6.8){$\scriptstyle A$}
\put( 4.8, 4.2){$\scriptstyle B$}
\put( 7.0, 6.4){$\scriptstyle C$}
\put( 4.9, 8.7){$\scriptstyle D$}
\put( 0.5, 6.8){$\scriptstyle E$}

\end{picture}
\PGrestore