\input{preamble-standalone.ltx} \begin{document} % Ex. No. 153 (Section 19.2.3 : 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{J_c} \tkzGetSecondPoint{T_c} \tkzGetLength{rJc} \tkzDrawCircle[R](J_c,{\rJc pt}) \tkzDrawLines[add=0 and 1](C,A C,B) \tkzDrawSegment(J_c,T_c) \tkzMarkRightAngle(J_c,T_c,B) \tkzDrawPoints(A,B,C,J_c,T_c) \end{tikzpicture} \end{document}