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

% Ex. No. 112 (Section 15.2.2 : Option \tkzname{school})

\begin{tikzpicture}
  \tkzDefPoint(0,0){A} \tkzDefPoint(4,0){B}
  \tkzDrawTriangle[school,fill=red!30](A,B)
  \tkzMarkRightAngles(tkzPointResult,B,A)
\end{tikzpicture}

\end{document}