Technique: How to accurately piece the triangle
border on the Dresden Friends block
Here is what you need:
Cut triangles according pattern instructions
Easy Angle Ruler by Wrights
Here is what you do:
Position the ruler on top of a triangle, aligning the edges of the ruler with the edges of the fabric. Trim off the point. Flip the fabric over and trim off the other point. The red triangle shown has had its points trimmed.
To sew, position one triangle on top of another so that the trimmed end of the triangle on tip kisses the edge of the triangle on bottom. Pin triangles if desired.
Start stitching at the "kiss" point, and continue stitching off the end. The black line indicates the stitching line. Continue adding triangles in the manner until you have enough to make a border.