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+\input{preamble-standalone.ltx}
+\begin{document}
+
+% Ex. No. 57 (Section 9.2.7 : Inversion of points)
+
+\begin{tikzpicture}[scale=1.5]
+ \tkzDefPoint(0,0){O}
+ \tkzDefPoint(1,0){A}
+ \tkzDefPoint(-1.5,-1.5){z1}
+ \tkzDefPoint(0.35,0){z2}
+ \tkzDefPointBy[inversion =%
+ center O through A](z1)
+ \tkzGetPoint{Z1}
+ \tkzDefPointBy[inversion =%
+ center O through A](z2)
+ \tkzGetPoint{Z2}
+ \tkzDrawCircle(O,A)
+ \tkzDrawPoints[color=black,
+ fill=red,size=4](Z1,Z2)
+ \tkzDrawSegments(z1,Z1 z2,Z2)
+ \tkzDrawPoints[color=black,
+ fill=red,size=4](O,z1,z2)
+ \tkzLabelPoints(O,A,z1,z2,Z1,Z2)
+\end{tikzpicture}
+
+\end{document} \ No newline at end of file