I'm making a bench from the Family Handyman web site. Here is the link: http://www.familyhandyman.com/woodworking/projects/build-a-painting-bench/view-all They said " Cut parallel 5-degree bevels on the top and bottom of the legs". I don't understand why cutting the legs with a bevel? How is the bench seat is going to fit on the legs if they are cut with the bevel?

I'm a beginner, I which there was a woodworking club close to where I live !! thank you for the answer Carole