Losie
I do think the math is still off .... original DJ has 4 1/2" blocks - if you increase to 5 1/2" -----you set up an equation to determine how much of an increase you have:
5.5/4.5 = x/100 [why? because 4.5= 100% or equivalent to the original - you solve for "x" by multiplying crosswise... 5.5 x 100 has to equal 4.5 time "x" or in other words 550 is divided by 4.5 .... you end up with 122% [exactly 122.2222] so you have to multiply your original sizes by 1.22
1.22 x 4.5 = 5.49 which approximates 5.5
1.22 x 5 and 1.22 x 8 [the dimensions of the original DJ triangles] = 6.1 x 9.76 - I would call this 6 x 9 3/4
the 6.85 x 8.0 measurement is going to give you something pretty squatty
Gus
btw - I totally agree that thatquilt blogsite makes things more complicated at times