Circumscribed circle

How can I use Grasshopper to detect the smallest possible circumscribed circle for these two White curves? The Orange circle is only an approximation of the true circumscribed circle.

circumcircle.3dm (3.5 MB)

Like this: (10.7 KB)

Sorry only saw just now your curves aren’t actually circles :man_facepalming:

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Yes they aren’t circles but look similar to circles.

In that case I think this requires Galapagos or some other optimization to find the longest line between two points. (9.5 KB)

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Yes, the longest line is the key here. Thank you for solution.

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Check this

smallest (10.1 KB)