\begin{tikzpicture} \tkzDefPoint(2,3){A} \tkzDefShiftPointCoord[2,3](30:4){B} \tkzDefBarycentricPoint(A=1,B=2) \tkzGetPoint{I} \tkzDrawPoints(A,B,I) \tkzDrawLine(A,B) \tkzLabelPoints(A,B,I) \end{tikzpicture}