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

% Ex. No. 217 (Section 26.3.1 : Use of \tkzcname{tkzSetUpCompass})

\begin{tikzpicture}[scale=.75,
	      showbi/.style={bisector,size=2,gap=3}]
  \tkzSetUpCompass[color=blue,line width=.3 pt]
  \tkzDefPoints{0/1/A, 8/3/B, 3/6/C}
  \tkzDrawPolygon(A,B,C)
  \tkzDefLine[bisector](B,A,C)  \tkzGetPoint{a}
  \tkzDefLine[bisector](C,B,A)  \tkzGetPoint{b}
  \tkzShowLine[showbi](B,A,C)
  \tkzShowLine[showbi](C,B,A)
  \tkzInterLL(A,a)(B,b) \tkzGetPoint{I}
  \tkzDefPointBy[projection= onto A--B](I)
	 \tkzGetPoint{H}
  \tkzDrawCircle[radius,color=gray](I,H)
  \tkzDrawSegments[color=gray!50](I,H)
  \tkzDrawLines[add=0 and -.2,color=blue!50 ](A,a B,b)
	\tkzShowBB
\end{tikzpicture}

\end{document}