I am finally working on building my chicken coop! Ya, LOL.. Well I came to a huge question. I am making the front 8 feet and the back 6 feet tall, the width will be 10 feet. I need help with how much of an angle I will need on the roof. I am far from being a carpenter, and this is my first big project!!! I would of been fin if I would of made it all the same sizes, but that wouldn't let the rain off. Thanks in advance!