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

% Ex. No. 124 (Section 17.1.1 : Using \tkzcname{tkzDefSquare} with two points)

\begin{tikzpicture}[scale=.5]
  \tkzDefPoint(0,0){A} \tkzDefPoint(3,0){B}
  \tkzDefSquare(A,B)
  \tkzDrawPolygon[color=red](A,B,tkzFirstPointResult,%
               tkzSecondPointResult)
  \tkzDefSquare(B,A)
  \tkzDrawPolygon[color=blue](B,A,tkzFirstPointResult,%
               tkzSecondPointResult)
\end{tikzpicture}

\end{document}