\input{preamble-standalone.ltx} \begin{document} % Ex. No. 70 (Section 10.1.11 : Option \tkzname{linear normed}) \begin{tikzpicture}[scale=1.2] \tkzDefPoint(1,3){A} \tkzDefPoint(4,2){B} \tkzDefPointWith[linear normed](A,B) \tkzGetPoint{C} \tkzDrawPoints[color=red](A,B,C) \tkzDrawSegment(A,B) \tkzLabelSegment(A,C){$1$} \tkzLabelPoints[above right=3pt](A,B,C) \end{tikzpicture} \end{document}