Using the Cut and Flip Diagonal Set Rulers.
:10 This video starts with a short review of diagonal set quilts and the relationship between setting triangles and corner triangles.
1:27 Learn why we cut from strips cut on the lengthwise grain.
2:00 See how to use the Cut and Flip Diagonal Set Triangle Ruler for corner triangles.
3:13 Learn how to use the Cut and Flip Diagonal Set Triangle Ruler to cut setting triangles, plus a close up view of the corner alignment when you flip the ruler.
4:00 See how the engineered corners automatically "remove the seam allowance" when you flip the ruler.
4:50 Watch as the setting triangle fits the block perfectly - no trimming to fit later!