Stitch them with 14 inch seam allowance, then press it open, and cut off the nubs.

Proceed to piece together the remaining fabric triangles for the half-square triangle.

*All these images are credited toThe Quilted Kitchenvia YouTube.

Beginner-Friendly Folded Corners Quilt Block Tutorial

Image credit: The Quilted Kitchen via YouTube

Beginner-Friendly Folded Corners Quilt Block Tutorial

Easy Folded Corners Quilt Block Tutorial

Easy to Make Folded Corners Quilt Block

Beginner-Friendly Folded Corners Quilt Block Tutorial