2D Centerline of Slot hole

Hi, I'm wondering how can I get two 2d centerlines
of Slot Hole (2 selected arcs and 2 selected lines)

Thanks for any suggestions

In interactive NX, if you start the center mark command and select the arc centers, 2 center marks will be created at the arc centers with a line drawn between them. Is this the result you want? If so, try doing the same while recording a journal; this will give you the required NXOpen commands to use on your objects.