[fordav11]

In the drawing below I have a line at an angle and some vertical lines crossing it.
The circle top left has a 90 degrees square section on the lower left side (red circle drawn around it) which I want to call my reference point.

Is it possible to set a reference point on an object so the readout gives me the position at that point relative to the UCS X0 Y0?

Next....

The cyan line inside the circle is perpendicular to the longer cyan line at an angle to show the tangent point on the circle (but this line would not normally be drawn)

I want to group the entire circle object as one object then pickup that object with the pointer on some kind of 'handle' and move it near the longer angled cyan line.

I want the circle to snap to a tangent of the angled line where each of the vertical lines intersect the angled line.

Is this possible and if so what are the commands to achieve this?

I'm using Autocad 2007.

Thanks!