I'm sure they could be machine pieced, but have never done it that way, so no advise there. I am on my 3rd hexagon quilt, (GFG) and use "english paper piecing" method. I use paper hexagon to stitch the fabric to, (print and cut my own) then whip stitch them together. Do a search for EPP and you will get lots of hits. I have to tell you, it is very addictive! At least it is for me. I'm already planning my 4th. Good luck with how ever you do it.