\input{preamble-standalone.ltx} \begin{document} % Ex. No. 206 (Section 29.2.7 : Exemple : John Kitzmiller ) \begin{tikzpicture}[scale=2,decoration={markings, mark=at position 3cm with {\arrow[scale=2]{>}}}] \tkzDefPoints{0/0/E, 6/0/F, 0/1.8/P, 6/1.8/Q, 0/3/R, 6/3/S} \tkzDrawLines[postaction={decorate}](E,F P,Q R,S) \tkzDefPoints{3.5/3/A, 5/3/B} \tkzDrawSegments(E,A F,B) \tkzInterLL(E,A)(P,Q) \tkzGetPoint{C} \tkzInterLL(B,F)(P,Q) \tkzGetPoint{D} \tkzLabelPoints[above right](A,B) \tkzLabelPoints[below](E,F) \tkzLabelPoints[above left](C) \tkzDrawSegments[style=dashed](A,F) \tkzInterLL(A,F)(P,Q) \tkzGetPoint{G} \tkzLabelPoints[above right](D,G) \tkzDrawSegments[color=teal, line width=3pt, opacity=0.4](A,C A,G) \tkzDrawSegments[color=magenta, line width=3pt, opacity=0.4](C,E G,F) \tkzDrawSegments[color=teal, line width=3pt, opacity=0.4](B,D) \tkzDrawSegments[color=magenta, line width=3pt, opacity=0.4](D,F) \end{tikzpicture} \end{document}