Flatten a variable simple curved surface

[metcalfm72Z88]

I am new to Fusion 360. How do I flatten these surfaces to create flat patterns for cutting.  They were created by offsetting from a solid.  They are simple curved surfaces that can be cut out of a piece of paper. Outside of exporting to Pepakura or Meshmixer (unwrap) any suggestions?

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[hamid.sh.]

If they are developable surfaces you can convert them to Sheet Metal (Sheet Metal > Create > Convert to Sheet Metal) and then use Create > Create Flat Pattern.

If possible share your file (or just surfaces) here so others can help.