Annie 的拼布者數學快速參考手冊

The rotary cutting formulas are laid out so clearly that I didn't have to flip back and forth. This booklet saved me from ripping out seams on a tricky diagonal set.

I’m tired of redoing math for every quilt—this booklet has the setting triangle formulas right there, and the rotary cutting diagram saved me from a big miscalculation. It’s compact enough to keep next to my machine.

The setting and corner triangle formulas are exactly what I kept flipping back to during a diagonal-set project, and the booklet stays open flat on my cutting table, which is a small win. Wish it had a few more worked examples for odd quilt sizes, but for quick reference it does the job.