\pstGeonode{A}
\pstGeonode[PosAngle=-135, PointNameSep=1.3](0,3){B_1}
\pstGeonode[PointSymbol=pentagon,dotscale=2, 
            fillstyle=solid,fillcolor=OliveGreen, 
            PtNameMath=false,PointName=$B_2$, 
            linecolor=red](-2,1){B2}
\pstGeonode[PosAngle={90,0,-90},PointSymbol={*,o},
            linestyle=dashed, CurveType=polygon,
            PointNameSep={1em,2em,3mm}]
  (1,2){M_1}(2,1){M_2}(1,0){M_3}
\pstGeonode[PosAngle={50,100,90}, 
            PointSymbol={*,x,default},
            PointNameSep=3mm, CurveType=curve,
            PointName={\alpha,\beta,\gamma,default}]
  (-2,0){alpha}(-1,-2){beta}(0,-1){gamma}(2,-1.5){T}