I have a quilt pattern that calls for a divided rectangle 4" by 8". I used to have great instructions and I can't find them anymore. You can easily cut them with the Tri rec ruler, but this one is bigger than the ruler. Is there anyone out there who knows how to do it the old fashioned way, before we had all the rulers?
Here is the block. I could use a template, but I know there is a formula
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