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\begin{tikzpicture}
\edef\alphaR{\fpeval{asin(2/3)}}
\edef\xB{8-3*cos(\alphaR)}
\tkzDrawX[noticks,label=$(d)$]
\tkzDefPoint["$A$" above right](8,2){A}
\tkzDefPoint[color=red,"$O$" above right](0,0){O}
\tkzDefPoint["$B$" above left](\xB,4){B}
\tkzDefLine[orthogonal=through B](A,B) \tkzGetPoint{b}
\tkzDefPoint(1,0){i}
\tkzInterLL(B,b)(O,i) \tkzGetPoint{B'}
\tkzDrawSegment[line width=1pt](A,B)
\tkzHLine[color=red,style=dashed]{4}
\tkzText[above](12,4){$\delta$}
\tkzDrawCircle[R,color=blue,line width=.8pt](A,3 cm)
\tkzDrawPoint(B')
\tkzDrawLine(B,B')
\end{tikzpicture}
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