I'm not really great with math..so I would just redraw it on EQ program.
Now..if you don't have that, I would take some paper, measure out and draw a block that is 12" x 12". I would then draw out the block (copying from your selection), then you can measure each piece exactly from this paper pattern that you created. Be SURE to add the 1/2" seam allowance. And also you'll have to cut out the parts that are paper pieced and use this pattern to do the paper piecing.
Good luck! Its a really great block!