excel vba : add AddPolyline with axis coordinates

in microsoft excel, with vba, I can add a fill polygon in a chart, like this

with this data

|1  |2 |
|2  |5 |
|10 |20|
|11 |20|

en this vba code

Sub triangle_scatter()
    Dim cht As Chart
    Set cht = ActiveSheet.Shapes.AddChart(XlChartType:=xlXYScatterSmoothNoMarkers).Chart

    Dim triArray(1 To 4, 1 To 2) As Single
    triArray(1, 1) = 25
    triArray(1, 2) = 100
    triArray(2, 1) = 100
    triArray(2, 2) = 150
    triArray(3, 1) = 150
    triArray(3, 2) = 50
    triArray(4, 1) = 25
    triArray(4, 2) = 100

    With cht
        .SetSourceData Source:=Range("A3:B6")
        .Shapes.AddPolyline triArray
    End With

End Sub

but in this case the triangle is generated with coordinates of plot area, how I can plot with the axis coordinates ?