Display MoreYou just need LibreOffice (witch is free) or any commercial equivavent to read it.
I share the file, if you want to try. It lets you do trigonometric calculations effortlessly; you just have to fill in the green boxes. Don't change anything else. In your case, you can also ignore everything related to conical roofs or roman tiles.
So you have two values to find, which are specific to your situation. The module is (to simplify) the width (in blocks) of a slope of your roof as seen from above, so generally half the width of your room, including the walls. The height is (to simplify) the height of your roof between the ridge and the top of the wall.
Once completed, the construction method is similar to what Avanar showed you. For example, you can find the exact angle in the first table (named "Angles"), and then you just need to use the /rotation command to correctly position your block IG. However, I recommend experimenting IG first to find a value close to your angle so you can more easily find the correct value in the table, which covers a wide variety of cases.
Furthermore, if you want to see an example, dismantle the barn I posted yesterday, its roof - quite simple - is made with the default values of this file.
I'm a little lost her. I'm not sure how to use your spreadsheet, where to put what, and what rotation command you mean.