Centralizing Control Points

How can I connect the control points that make up the circle to form a closed surface in the center? For example , I want to make it like in the pictures but I can’t make such a catch. How is that possible?

456776

Checkout the
_SetPt command

Thanks for the answer. You are right, this is how it happens, but how is this done with only gumball movement in the picture? How do you calculate the intersection point and meet the points in the center with only gumball?

A workaround could be to place a temporary point there you can snap onto.

Or use the _between snap while in the SetPt command:
https://docs.mcneel.com/rhino/7/help/en-us/index.htm#user_interface/object_snaps.htm#Osnap_Between%3FTocPath%3DObject%2520snaps|_____4

Thanks, this is useful for now.

Finally ı found the solution.