\input{preamble-standalone.ltx} \begin{document} % Ex. No. 134 (Section 20.2.3 : Exinscribed circles.) \begin{tikzpicture}[scale=1] \tkzDefPoints{0/0/A,4/0/B,1/2.5/C} \tkzDrawPolygon(A,B,C) \tkzDefCircle[ex](B,C,A) \tkzGetPoint{Jc} \tkzGetSecondPoint{Tc} \tkzGetLength{rJc} \tkzDrawCircle[R](Jc,{\rJc pt}) \tkzDrawLines[add=0 and 1](C,A C,B) \tkzDrawSegment(Jc,Tc) \tkzMarkRightAngle(Jc,Tc,B) \tkzDrawPoints(A,B,C,Jc,Tc) \end{tikzpicture} \end{document}