angle dimension surface 3d
Unroll surface and define angles and direction of doubles Between faces of surfaces

Good day
First of all, Thanks for your help

Esteemed group of 3d rhinoceros

I would like to ask for guidance for this problem that I have for days,
I have some models in 3d. I need to fold with the angles that these models have but I can not find the right angle to bend equal to the model. Since there is no tool that does this.
depronto someone can guide me
I apologize for the inconvenience

I left a model and an image to explain myself better

Thanks for your reply,
But it does not give me the right angle since it takes angles in 2d
And I need to know the angles between faces dim angle 3d.

I have left an example,
I had to orientate each piece
To project the curves on the surface
And flattening said curves in a view view for using angle 2d

It is complex to unwind the piece, not knowing the correct angles between faces.
Since the pieces are made on the 3d model

Or unwind the surface and automatically tell which is the angle in the plane 2d with the direction of folding example 120 ° above or 120 ° below.

If I understand what you want correctly, I suggest you create a temporary plane perpendicular to each fold line, then intersect the sides of your part on each side of the fold line with the temporary plane. Measure the angle between the lines created by the intersection(s). This should give you the angle to use when unfolding the piece to flat.