\input{preamble-standalone.ltx} \begin{document} % Ex. No. 189 (Section 26.1.3 : Exemple de \tkzcname{tkzShowLine} et \tkzname{bisector}) \begin{tikzpicture}[scale=1.25] \tkzDefPoints{0/0/A, 4/2/B, 1/4/C} \tkzDrawPolygon(A,B,C) \tkzSetUpCompass[color=brown,line width=.1 pt] \tkzDefLine[bisector](B,A,C) \tkzGetPoint{a} \tkzDefLine[bisector](C,B,A) \tkzGetPoint{b} \tkzInterLL(A,a)(B,b) \tkzGetPoint{I} \tkzDefPointBy[projection = onto A--B](I) \tkzGetPoint{H} \tkzShowLine[bisector,size=2,gap=3,blue](B,A,C) \tkzShowLine[bisector,size=2,gap=3,blue](C,B,A) \tkzDrawCircle[radius,color=blue,% line width=.2pt](I,H) \tkzDrawSegments[color=red!50](I,tkzPointResult) \tkzDrawLines[add=0 and -0.3,color=red!50](A,a B,b) \end{tikzpicture} \end{document}