\input{preamble-standalone.ltx} \begin{document} % Ex. No. 156 (Section 19.4.1 : Example from a sangaku) \begin{tikzpicture} \tkzInit[xmin=0,xmax = 6,ymin=0,ymax=6] \tkzDefPoint(0,0){B} \tkzDefPoint(6,0){C}% \tkzDefSquare(B,C) \tkzGetPoints{D}{A} \tkzClipPolygon(B,C,D,A) \tkzDefMidPoint(A,D) \tkzGetPoint{F} \tkzDefMidPoint(B,C) \tkzGetPoint{E} \tkzDefMidPoint(B,D) \tkzGetPoint{Q} \tkzDefTangent[from = B](F,A) \tkzGetPoints{G}{H} \tkzInterLL(F,G)(C,D) \tkzGetPoint{J} \tkzInterLL(A,J)(F,E) \tkzGetPoint{K} \tkzDefPointBy[projection=onto B--A](K) \tkzGetPoint{M} \tkzFillPolygon[color = green](A,B,C,D) \tkzFillCircle[color = orange](B,A) \tkzFillCircle[color = blue!50!black](M,A) \tkzFillCircle[color = purple](E,B) \tkzFillCircle[color = yellow](K,Q) \end{tikzpicture} \end{document}