\input{preamble-standalone.ltx} \begin{document} % Ex. No. 180 (Section 21.3.1 : Example with \tkzname{pos}) \begin{tikzpicture}[rotate=30] \tkzDefPoint(2,1){S} \tkzDefPoint(7,3){T} \tkzDefPointBy[rotation=center S angle 60](T) \tkzGetPoint{P} \tkzDefLine[bisector,normed](T,S,P) \tkzGetPoint{s} \tkzDrawPoints(S,T,P) \tkzDrawPolygon[color=blue](S,T,P) \tkzDrawLine[dashed,color=blue,add=0 and 3](S,s) \tkzLabelPoint[above right](P){$P$} \tkzLabelPoints(S,T) \tkzMarkAngle[size = 1.8cm,mark = |,arc=ll, color = blue](T,S,P) \tkzMarkAngle[size = 2.1cm,mark = |,arc=l, color = blue](T,S,s) \tkzMarkAngle[size = 2.3cm,mark = |,arc=l, color = blue](s,S,P) \tkzLabelAngle[pos = 1.5](T,S,P){$60^{\circ}$}% \tkzLabelAngles[pos = 2.7](T,S,s s,S,P){$30^{\circ}$}% \end{tikzpicture} \end{document}