\input{preamble-standalone.ltx} \begin{document} % Ex. No. 128 (Section 17.3.2 : Simple example) \begin{tikzpicture}[scale=1] \tkzDefPoints{0/0/A,3/0/B,4/2/C} \tkzDefPointWith[colinear= at C](B,A) \tkzGetPoint{D} \tkzDrawPolygon(A,B,C,D) \tkzLabelPoints(A,B) \tkzLabelPoints[above right](C,D) \tkzDrawPoints(A,...,D) \end{tikzpicture} \end{document}