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\begin{tikzpicture} \tkzInit[ymin=-0.5,ymax=3,xmin=-0.5,xmax=7] \tkzDefPoint(0,0){A} \tkzDefPoint(02.25,04.25){B} \tkzDefPoint(4,0){C} \tkzDefPoint(3,2){D} \tkzDrawSegments(A,B A,C A,D) \tkzSetUpPoint[shape=cross out,size=4,] \tkzDrawPoints(A,B,C,D) \tkzLabelPoints(A,B,C,D) \end{tikzpicture}