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+\input{preamble-standalone.ltx}
+\begin{document}
+
+% Ex. No. 64 (Section 10.1.5 : Option \tkzname{orthogonal} with $K=-1$)
+
+\begin{tikzpicture}[scale=.75]
+ \tkzDefPoint(1,2){O}
+ \tkzDefPoint(2,5){I}
+ \tkzDefPointWith[orthogonal](O,I)
+ \tkzGetPoint{J}
+ \tkzDefPointWith[orthogonal,K=-1](O,I)
+ \tkzGetPoint{K}
+ \tkzDrawSegment(O,I)
+ \tkzDrawSegments[->](O,J O,K)
+ \tkzMarkRightAngles(I,O,J I,O,K)
+ \tkzDrawPoints(O,I,J,K)
+ \tkzLabelPoints(O,I,J,K)
+\end{tikzpicture}
+
+\end{document} \ No newline at end of file