\begin{tikzpicture}[rotate=90] \tkzDefPoint[label=right:$A_n$](2,3){A} \begin{scope}[shift={(A)}] \tkzDefPoint[label= right:$B_n$](31:3){B} \tkzDefPoint[label= right:$C_n$](158:3){C} \end{scope} \tkzDrawSegments[color=red,% line width=1pt](A,B A,C) \tkzDrawPoints[color=red](A,B,C) \end{tikzpicture}