\input{preamble-standalone.ltx}
\begin{document}

% Ex. No. 80 (Section 12.1.2 : Example with \tkzname{bisector} and \tkzname{normed})

\begin{tikzpicture}[rotate=25,scale=.75]
 \tkzDefPoints{0/0/C, 2/-3/A, 4/0/B}
 \tkzDefLine[bisector,normed](B,A,C) \tkzGetPoint{a}
 \tkzDrawLines[add= 0 and .5](A,B A,C)
 \tkzShowLine[bisector,gap=4,size=2,color=red](B,A,C)
 \tkzDrawLines[blue!50,dashed,add= 0 and 3](A,a)
\end{tikzpicture}

\end{document}