\pstTriangle[PointSymbol=none](2;15){A}(2;85){B}(2;195){C} \pstRightAngle[RightAngleSize=.3, linecolor=red, linewidth=.5pt]{C}{B}{A} \pstMarkAngle[linecolor=cyan, linewidth=1.5pt]{A}{C}{B}{$\theta$} \pstMarkAngle[linecolor=red, linewidth=1.5pt, arrows=->]{B}{A}{C}{$\gamma$}