HST
Sewinghalf square triangle
Description
A fundamental quilting block consisting of two right-angled triangles sewn together along the diagonal to form a square.
Detailed explanation
A half square triangle (HST) is a versatile unit used to create geometric patterns like stars, pinwheels, and chevrons. It is formed by joining two contrasting triangles along their long bias edge to create a perfect square. Quilters often use quick-piecing methods to construct multiple HSTs simultaneously rather than cutting and sewing individual triangles.