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\input{preamble-standalone.ltx}
\begin{document}
% Ex. No. 83 (Section 12.1.5 : A parabola)
\begin{tikzpicture}[scale=.75]
\tkzInit[xmin=-6,ymin=-4,xmax=6,ymax=6]
\tkzClip
\tkzDefPoint(0,0){O}
\tkzDefPoint(132:5){A}
\tkzDefPoint(4,0){B}
\foreach \ang in {5,10,...,360}{%
\tkzDefPoint(\ang:4){M}
\tkzDefLine[mediator](A,M)
\tkzDrawLine[color=magenta,add= 3 and 3](tkzFirstPointResult,tkzSecondPointResult)}
\end{tikzpicture}
\end{document}
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