unire due lamiere with piega (blessing)

[leggera]

Hello.

I am trying to combine two sheets on two different planes and with inclination as from image, but with the fold it only works if the edges are parallel.
Is there a possibility to combine the two plates, made on the same part on two sketches?

Thank you.

 

[Cast16]

I would do:
1. find the intersection axis between the two floors.
2. make the two edges parallel to this axis.
3. add fold.

It would be better to attach the file when you can. so someone can try. See how others have done is clearer than hundreds of words. . .