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\begin{tikzpicture}[scale=.75]
\tkzInit[xmax=5,ymax=4]
\tkzDefPoint(1,1){O}
\tkzDefPoint(0,4){A}
\tkzDefPoint(5,0){B}
\tkzDefPoint(3,3){C}
\tkzInterLC(A,B)(O,C) \tkzGetPoints{D}{E}
\tkzDrawCircle(O,C)
\tkzDrawPoints[color=blue](O,A,B,C)
\tkzDrawPoints[color=red](D,E)
\tkzDrawLine(A,B)
\tkzLabelPoints[above right](O,A,B,C,D,E)
\end{tikzpicture}
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