Sew Easy: Cutting 30-Degree Triangles

Sew Easy: Cutting 30 Degree Triangles

30-degree triangles are a common shape, used frequently for diamond rectangle units and setting triangles. Below you’ll find both video and image+text tutorials for this technique with clear, step-by-step instructions. PLUS—if you’ve found this lesson useful, you can download a copy of this AND many more Sew Easy lessons in our FREE eBooklet Sew Easy Lessons: The Essential Collection of Quilting Techniques. Click here to download your copy of this lesson plus many other tried-and-true patchwork tutorials!

Video Tutorial

Step-by-Step Sew Easy Instructions

  1. Begin with strip cut to desired height of triangle, plus ⅞” for seam allowance. Place ruler on strip, aligning 30-degree mark on ruler with one long edge of strip, and trim.
  2. Re-position strip and align 30-degree mark on ruler with bottom edge of strip to create triangle.
  3. Cut to make triangle.
  4. Align 30-degree mark on ruler along top edge of strip.
  5. Cut to make another triangle. Continue aligning 30-degree mark as described to cut remaining strip into triangles.

Products used: Havel’s Self-Healing Cutting Mat, Havel’s 45mm Rotary Cutter, and Havel’s 6″ x 24″ Fabric Ruler. Check out Havel’s Sewing for more information and a complete catalog.

Fabric from Abstract Collage collection by Ampersand for Paintbrush Studio Fabrics.

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