Originally Posted by
Cass62
It's because with TWO 10" pieces of fabric, the area is 200 square inches total fabric. The diagonal measurement of 10" square is 14" inches. That would leave you with four 7" squares after cutting both directions, then the seam allowances take up 1/2". That leaves you with four 6 1/2" HST's.
agree with Cass62 - think of the "volume" of the fabric squares, not the outer dimensions... two 10" pieces = 200 square inches - divide by 4 (the final number of squares) to get 50 square inches per final square...the seam allowances reduce the measurable square inches per final square. 50 square inches is roughly 7 x 7 inches....