In this workshop Jennie shows you how to use pre-printed angles on the rotary cutting rulers.
The angles on the rulers allow you to cut 45 degree and 60 degree. Why are these useful? Well, the 45 degree gives you a perfect angle for cutting bias strips and also triangles from strips; and then the 60 degree also gives you the possibility of cutting a triangle and indeed diamonds from strips.
So the ruler becomes multi-talented.