The first picture is of my nine blocks for August. Then the other two are up close views so you can see them a little better. I was very careful not to duplicate combinations and my son looked at them for me to confirm, so, I believe, they should be okay.
I used my Tri-Rec rulers and am very happy with how they turned out. It was easier than I thought it would be. Thanks, Sophie, for luring me out of my comfort zone. I have always been a little afraid of triangles.