Things You'll Need
Instructions
Align the triangular quilt piece with the quilt square onto which it will be pieced on a cutting mat.
Choose the correct triangle trimmer by lining up the trimmer edge along the triangle corner that needs to be cut.
Roll the rotary cutter across the quilt triangle. Press firmly and run it tightly against the edge of the triangle trimmer.
Discard the trimmed corners, and sew the cut triangular quilting piece to its corresponding quilt square.