Made by: Polly Carlson

As a former math and chemistry teacher, I’m always looking for new math and science fabrics and fun ways to use them. So the hardest part for me was narrowing down which of my fabrics to use. The fabrics in the instructions (the green hot pad) are all from the Geekery line by Sue Marsh for RJR Fabrics. The white geometry fabric is part of the Encyclopedia Galactica line by Andover Fabrics. You can also look for food an berry fabrics to make your favorite Pi-Flavor puns…in this case we went for Cherry Pi.

Instructions

Step One

Gather your supplies, including the Pi applique template. You can download it from the link above.

Step Two

Use a large mixing bowl as your template and cut out a circle for the top of your hot pad. My bowl is 13.5 inches across.

Trace your Pi shape on the papery side of your thermal adhesive. Cut out.

Iron onto the BACK of your coordinating fabric.

Peel off the paper backing and iron on to the center of your circle.

Step Three

Use a satin stitch or tight zigzag stitch to sew around the edge of your Pi. Hide threads on the back of your fabric.

Step Four

Layer your fabrics. Put the Solarize liner fabric on bottom, then a double layer of cotton batting, then your backing fabric face UP and your top circle face DOWN.

Pin through all layers making sure it lays flat.

Step Five

Sew with a 3/8 inch seam allowance, leaving an opening for turning your project.

Trim at about 1/8 of an inch. Leave the FULL seam allowance at the opening.

Step Six

Turn right side out. Top-stitch around the outside edge. Tuck the seam allowance at the opening under and the topstitching will keep your opening closed.