Here is our little mini practice quilt. I didn't take pictures when I did my actual hexagon quilt so I had to improvise.
I generally do a 1/4 inch binding, but this could certainly be adjusted for a wider binding. Normally, when attaching a binding you want to sew then backstitch 1/4 inch from the edge. With this wider angle it's a bit different. Mark a line directly in the center of your corner angle as shown below. Stop stitching where your needle intersects this diagonal line. To make sure you stop at the correct place, you could mark this with a pin.
I have stitched to the marked spot and am ready to fold my binding. First fold it up so the binding strip is in line with your quilt edge. Your fold should follow the line we marked above.
Now fold it down to again be in line with the quilt edge. Hold with a pin while you begin sewing from the top of the new side.
Here we have a finished seam to hold the binding.
Now fold over the corners and bind as usual. (front view)
It's very simple with just a few adjustments. Let me know if you have more questions.