My husband is trying to figure out how to measure and attach drywall to some odd spots in our new addition. The spots are over peaked windows. From the upper edge of the wall we have a triangle shape rather than a pentagon, which basically means trying to hang the ceiling drywall on 2 sides of the inside of a pyramid. The problem is not just getting the surface measurement right, but how to attach it. Other than doing a lot of hit and miss ... is there an easier way?