The math for corner to corner sewing like we used in the bow-tie block is "easy-peasy-lemon-squeesy", as my six year old is fond of saying.
In English, add a half an inch to the length of the triangle, and cut out a square with those dimensions. Your main square is also cut a half inch larger than the finished square.
1.5 + .5 = 2 and 6 + .5 = 6.5
I would need to cut four 2 inch squares and one 6.5 inch square to make this block.
Next week we start in on flying geese!