Originally Posted by judylg
I would like to end up with a 9 inch block, in a pinwheel and a nine patch or even just a 4. I thought I had seen a formula, thought I marked it, but do you think I can find it, no. Spent last night looking. Thanks for pointing me in the right direction, appreciate it.
Well, a pinwheel is based on a 4 patch, 2 across and 2 down. So you would need 4 HSTs to make it, and each HST would need to be 5" unfinished to finish at a 9" pinwheel. Here is a site with my favorite method for making the HSTs.
http://www.kathkwilts.com/lessons/halfsqr.html
A nine patch is 3 across and 3 down, so to make one that will finish at 9" block, you would need to cut 9 3.5" squares.