If you use bias binding, it's the exact same method as binding a square quilt.
If you don't use bias binding, you will not be a happy camper. ;)
Personally, I think it's a more finished look for a quilt, especially with a sophisticated design like the one created with the wedges.
And if you're unsure, just make a small half circle quilt sandwich from scraps and try to attach a piece of (bias) binding to it.