\input{preamble-standalone.ltx} \begin{document} % Ex. No. 202 (Section 24.3 : Option \tkzname{rotate}) \begin{tikzpicture} \tkzDefPoint(0,0){O} \tkzDefPoint(2,-2){A} \tkzDefPoint(60:2){B} \tkzDrawLines[add = 0 and .5](O,A O,B) \tkzDrawArc[rotate,color=red](O,A)(180) \tkzDrawPoints(O,A,B) \tkzLabelPoints[below](O,A,B) \end{tikzpicture} \end{document}