45-degree triangles are most often used when you want to create a diamond shape in a quilt. Cutting them from strips makes them so much easier!
To accommodate the seam allowance, cut the fabric strip as wide as the finished width of the diamond + ½” for the seam allowance. As example, for a 3 ½” wide diamond, cut the fabric strip 4” wide.
Tools: 18”x24” cutting mat (RM-SG) or 24”x36” cutting mat (RM-MG); 45mm rotary cutter (RTY-2/NS); 6”x24” rectangular ruler ((QR-6x24); 6”x12” rectangular ruler (QR-6x12)
- Square your fabric and cut a strip.
- Turn the strip horizontally on your cutting mat and square the end.
- Place the ruler on the strip, aligning the 45° line on your ruler along the horizonal edge of your strip. You may need a longer 6”x24” ruler to accomplish this.
- Cut along the ruler edge from the bottom of the strip to the top. Save the cut off piece for scraps.
- Align the 45° line on your ruler along the horizonal edge of your strip.
- Move the ruler over until you have the measurement the same as the strip size you cut previously.
- Cut along the ruler edge from the bottom to the top, making a parallel cut.
- Continue moving the ruler along the strip until you have the number of diamonds you need.