Why can’t this surface calculate the area?
area.gh (69.8 KB)
Probably the surface is not planar.
Converting it to a mesh and using mesharea could solve it.
I think this happens because the ends of your trim curve are coincident with the original surface edge.
While it does create a valid intersection curve, I’d try to avoid this.
You either have to extend the inner edge of your original surface and trim with two curves or modify to the trim curve.
area.gh (259.6 KB)
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