\input{preamble-standalone.ltx}
\begin{document}

% Ex. No. 55 (Section  9.2.5 : Example of rotation)

\begin{tikzpicture}[scale=0.5]
 \tkzDefPoint(0,0){A}
 \tkzDefPoint(5,0){B}
 \tkzDrawSegment(A,B)
 \tkzDefPointBy[rotation=center A angle 60](B)
 \tkzGetPoint{C}
 \tkzDefPointBy[symmetry=center C](A)
 \tkzGetPoint{D}
 \tkzDrawSegment(A,tkzPointResult)
 \tkzDrawLine(B,D)
 \tkzDrawArc[orange,delta=10](A,B)(C)
 \tkzDrawArc[orange,delta=10](B,C)(A)
 \tkzDrawArc[orange,delta=10](C,D)(D)
 \tkzMarkRightAngle(D,B,A)
\end{tikzpicture}

\end{document}