\begin{tikzpicture}[rotate=15]
 \tkzDefPoint(2,3){A}
 \tkzDefShiftPointCoord[2,3](15:5){B}
 \tkzDefShiftPointCoord[2,3](-15:5){C}
 \tkzDrawSegments(A,B B,C C,A)
 \tkzDrawPoints(A,B,C)
 \tkzLabelPoints(B,C)
 \tkzLabelPoint[left](A){$A$}
\end{tikzpicture}
