create a 2d starting from 3d

[MarcoSci]

Good morning, I'm brand new.
I want a hand to find one or more solutions.
I press that I am using bricscad which is similar to autocad and has many of its commands.
I have to try to turn into 2d a series of triangles into 3d of a ground. I attach the photo to make you understand what I mean.
I don't have to be ultra precise, but I need it later to make a table, calculate the areas later for a sal.
I don't know if there are methods that keep the area, I tried with "flatten", but it would lose much of the surface. the inclination is strong enough.

I moved the bird down the corner.

How and what could I do?

thanks to those who answer

 

[Tristan]

bricscad (as autocad) is not the ideal software to do these things. in a handful of seconds, with civilization 3d (or any topography software worthy of that name) would pull out what you need. maybe on the net you find some lisp for this kind of work, but I wouldn't know where to download it (admitted and not allowed that then functions on bricscad... )

 

[dsw]

@marcosci proves the vedere if I addin does your case, it is not free but the cost is pretty low.