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

% Ex. No. 195 (Section 23.1.4 : \tkzcname{tkzDrawSector} and \tkzname{R})

\begin{tikzpicture}[scale=1.25]
 \tkzDefPoint(0,0){O}
 \tkzDefPoint(4,-2){A}
 \tkzDefPoint(4,1){B}
 \tkzDefPoint(3,3){C}
 \tkzDrawSector[R with nodes,%
                fill=blue!20](O,1 cm)(B,C)
 \tkzDrawSector[R with nodes,%
                fill=red!20](O,1.25 cm)(A,B)
\tkzDrawSegments(O,A O,B O,C)
\tkzDrawPoints(O,A,B,C)
\tkzLabelPoints(A,B,C)
\tkzLabelPoints[left](O)
\end{tikzpicture}

\end{document}