How do you calculate triangles in quilting?

What are setting triangles in quilting?

Setting triangles are quarter-square triangles that are created by cutting a square of fabric in half, twice diagonally, to produce four triangles with the straight grain on their long edge. That edge becomes the outer perimeter of a quilt unless borders are used.

How do you calculate HST in quilting?

Includes tips on figuring cutting size and trimming units. The formula for cut size of a square to make a pieced square of half-square triangles is: side of square + 7/8 (e.g. finished square = 2, cut size of square is 3 3/8).

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