\input{preamble-standalone.ltx} \begin{document} % Ex. No. 94 (Section 13.1.6 : Bisectors in a triangle) \begin{tikzpicture}[scale=1.25] \tkzDefPoint(0,0){A} \tkzDefPoint(4,0){B} \tkzDefPoint(1,3){C} \tkzDrawPolygon(A,B,C) \tkzSetUpLine[color=purple] \tkzDrawLine[bisector](B,C,A) \tkzDrawLine[bisector](C,A,B) \tkzDrawLine[bisector](A,B,C) \end{tikzpicture} \end{document}