It is a 60 degree triange, isn't it? With a piece added on the bottom the make it 2 colors. Then you sew them together like you would a star pattern, watching your color placement. What you think?
The Sara Nephew block is called Hallow Cube and it is using a 60 degree angle. It is in a book calledBig Book of Building Block Quilts. It is a really pretty quilt. Can do lot with color.