LISP Rotate 2 Lines by End Point

[sean.fincherTMHZD]

See the attached Image for better Context

I am trying to rotate 2 3D polylines so that they miss the circular block in the image above. Is there a Lisp where you can select two lines that meet at a common point and rotate them so that they rotate at the intersection point of the two lines whilst retaining their base point at the other end of the line? I.E I want to do to the red line what has been done to the green line. 

[Sea-Haven]

Manually, Line pick end, Tan, pick circle.

Line pick other end, Tan, pick circle.

Fillet 2 new lines.

Do you really need code

[sean.fincherTMHZD]

Thanks only issue was I was trying to reuse the 3D values for each polyline. Hence why I was trying to use rotate instead of manually picking the line in your way. Had a similar idea, and that might be the easiest way to do things then I can add new 3D data after the fact.