Triangulate surface

Hello everyone!

I don't know how to use grasshopper very well and I need help with something that I can't find a solution to. 

I'm trying to create the roof of the Grand Egyptian Museum in Cairo and I started doing that by creating triangle surfaces from 2 curves. I want to control each surface in order to change their size or to rotate them.

I would really appreciate it if someone helped me make it look like the actual roof as much as possible. 

Thank you!!