I measured my pieces with the green tape, but I was perplexed as how to measure a 45 degree angle. I even got on Wikipedia trying to find out a simple way to do it. In the process my eye caught sight of a Post-It note on the desk. What if Iwere to fold that in half from corner to corner? Then I could have a perfect triangle. And wouldn't you know...it worked! I measured, drew my 45 with the pencil and cut the wood with a hack-saw! Now, how will I hook these pieces together?