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

% Ex. No. 170 (Section 20.3.3 : An isosceles triangle.)

\begin{tikzpicture}[rotate=120,scale=.75]
 \tkzDefPoint(1,2){A}
 \tkzDefPoint(4,0){B}
 \tkzInterCC[R](A,4cm)(B,4cm)
 \tkzGetPoints{C}{D}
 \tkzDrawCircle[R,dashed](A,4 cm)
 \tkzDrawCircle[R,dashed](B,4 cm)
 \tkzCompass[color=red](A,C)
 \tkzCompass[color=red](B,C)
 \tkzDrawPolygon(A,B,C)
 \tkzDrawPoints[color=blue](A,B,C)
 \tkzMarkSegments[mark=s|](A,C B,C)
 \tkzLabelPoints[](A,B)
 \tkzLabelPoint[above](C){$C$}
\end{tikzpicture}

\end{document}