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\input{preamble-standalone.ltx}
\begin{document}
% Ex. No. 166 (Section 22.7.1 : Vérication de la mesure d'un angle)
\begin{tikzpicture}[scale=.75]
\tkzDefPoint(-1,1){A}
\tkzDefPoint(5,2){B}
\tkzDefEquilateral(A,B)
\tkzGetPoint{C}
\tkzDrawPolygon(A,B,C)
\tkzFindAngle(B,A,C)
\tkzGetAngle{angleBAC}
\edef\angleBAC{\fpeval{round(\angleBAC)}}
\tkzDrawPoints(A,B,C)
\tkzLabelPoints(A,B)
\tkzLabelPoint[right](C){$C$}
\tkzLabelAngle(B,A,C){\angleBAC$^\circ$}
\tkzMarkAngle[size=1.5cm](B,A,C)
\end{tikzpicture}
\end{document}
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