I may have hit my trigonometrical limit.
I've fabricated the two main pieces of the conservatory roof but now I'm left puzzling the size and shape that I will need to make the end triangles.
The problem is that in my initial calculations I didn't account for the overlap at the front and sides - where the gutter is - and so I don't feel confident that I know precisely what the height of the roof will be, and even the smallest margin of error will may leave some ugly gaps if I try to make the end pieces based only on my calculations.
Therefore I think I shall resort to doing what I usually do, which is take the time consuming, labour intensive option.
I shall attempt the glue these two pieces into a V shape and then form a template for the end pieces before fabricating the real ones and gluing them into place.
I only hope none of my former maths teachers are reading this - oh the shame!
(By the way, if you think the two pieces in the photo look wonky and not symmetrical it's just the angle the snap was take from.)