Originally Posted by
Holice
I don't understand why you must have the 60 degree ruler since you have a rectangle that is cut in half diagonally. Seems that is the important part and not that it is 60 degrees.
Especially since that lower right corner on the ruler does NOT fit right at the corner of the block because of the way the 60* line is drawn on the ruler.
A 60* line will work IF the 60* line goes right to the point of the corner of the ruler so that you can cut straight up the side of the block you've sewn.
The Olipfa 12.5" square ruler has such markings. Shown here in example, both 60° lines are on the ruler and 1 is placed on the block's diagonal seam.
Jan in VA