\input{preamble-standalone.ltx} \begin{document} % Ex. No. 97 (Section 16.2.2 : triangle 30 60 90 (school)) \begin{tikzpicture} \tkzInit[ymin=-2.5,ymax=0,xmin=-5,xmax=0] \tkzClip[space=.5] \begin{scope}[rotate=-180] \tkzDefPoint(0,0){A} \tkzDefPoint(4,0){B} \tkzDrawTriangle[school,fill=red!30](A,B) \tkzMarkRightAngles(B,A,tkzPointResult) \end{scope} \end{tikzpicture} \end{document}