Линейный размер

Sub Example_AddDimRotated()
    ' This example creates a rotated dimension in model space.
    Dim dimObj As AcadDimRotated
    Dim point1(0 To 2) As Double
    Dim point2(0 To 2) As Double
    Dim location(0 To 2) As Double
    Dim rotAngle As Double
    ' Define the dimension
    point1(0) = 0#: point1(1) = 5#: point1(2) = 0#
    point2(0) = 5#: point2(1) = 5#: point2(2) = 0#
    location(0) = 0#: location(1) = 0#: location(2) = 0#
    rotAngle = 120 'задаешь свой угол
    rotAngle = rotAngle * 3.141592 / 180#       ' covert to Radians
    ' Create the rotated dimension in model space
    Set dimObj = ThisDrawing.ModelSpace.AddDimRotated(point1, point2, location, rotAngle)
    ZoomAll
End Sub