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

% Ex. No. 115 (Section 15.2.5 : Option \tkzname{euclide})

\begin{tikzpicture}[scale=1]
    \tkzDefPoint(10,-5){K}
    \tkzDefPoint(13,-5){L}
    \tkzDrawTriangle[euclide,color=blue,fill=blue!10](K,L)
\end{tikzpicture}

\end{document}