pinterest is using Eleanor Burns method. I love it. No math involved though, you just add 2 in for each size.
6 in blocks for 2 1/2 in sqs. 8 in for 3 1/2 in sqs etc.
Her triangle square up ruler makes it even easier since you only need to make ONE cut. You square up before you open the square and you can cut off the little tabs at the same time. It is a must have time saver.
Last edited by Rose Marie; 02-27-2012 at 06:03 AM.