There are usually several lines drawn at different angles on your ordinary rotary cutting ruler. These lines can be used to make cuts at the designated angle. Here 3 strips - 3" wide are layered and then cut at 60° forming diamonds. Three diamonds can be sewn together to make a Tumbling Block or piece six together for a six pointed star.
If you use the 45° line on the ruler in the same way then a subtly different shaped diamond is formed. And eight of these can be put together to make an eight pointed star.
To learn more about the Y-seam, watch our workshop about Y-seam by clicking here. Also you can enjoy a workshop with Jennie on the Tumbling Block by clicking here.
Click here to learn more about Jennie Rayment.