Given an arc of a fixed radius but variable angle, how can I create a spline through points that is tangent to the arc so that I can split/trim and have a continuous, tangent curve?

The tangent snap does not appear to do this with splines.

Problem Tangency.3dm (3.0 MB)

Tan Osnap on

InterpCrv - Click on the points starting with the point furtherest from the arc. For final point move cursor over the arc and move until the Tan Osnap snaps.

Problem Tangency DC02.3dm (49.1 KB)

I had tried that but I’m not getting tangency. I split the arc using the curve you drew and GCON says G0, not G1.

Problem Tangency DC02.3dm (3.0 MB)

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