I have a "notion"
June Tailor 10-1/2-Inch-by-12-1/2-Inch Perfect Half-Square & Quarter-Square Triangles Ruler
I've been repeatedly informed that I can use this tool to cut 10 1/2" squares out of which I can make the above-mentioned triangles. Slots on the ruler go up to 6 1/2". I do understand that I can make 6 1/2" squares and then small triangles. I have been thinking since the beginning of last month and still lack that Eureka moment when all becomes obvious regarding the larger measurements. How might my goal be practically accomplished with this tool?