It's been too long since I've use any real math. I need some help in finding the surface area of my roof. It's 24 ft wide by 48 ft long with a 42 degree roof. My uncle just stopped by and said he'd do it if he had help, but he can't, and I need to replace 4 of the 6 trusses holding the roof up, then add at least 5 more because the 8 ft spans are too far apart to properly support any snow weight. Which is why the roof is caving in. Anyway, I'm not good at this.