Quilting Math Question
10-12-2011, 04:44 PM
#21
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Half square triangles - If cut from a square - the theoretical amount to the add to the finished size is 7/8 inch. I actually add an inch and trim the HST units down after sewing them.
(Example: Four inch finished size (two pieces make a square unit) - cut 4-7/8 inch squares
Quarter square triangles - if cut from a square - the theoretical amount to add to the finished size is 1-1/4 inch
(Example: Four inch finished size (four pieces in the square unit) - cut 5-1/4 inch squares.
(Example: Four inch finished size (two pieces make a square unit) - cut 4-7/8 inch squares
Quarter square triangles - if cut from a square - the theoretical amount to add to the finished size is 1-1/4 inch
(Example: Four inch finished size (four pieces in the square unit) - cut 5-1/4 inch squares.
10-13-2011, 03:57 AM
#23
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10-13-2011, 05:23 AM
#27
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Originally Posted by lee_stitches
Pythagorean Theorem? A squared + B squared = C squared is the formula for a right triangle. 8 squared + 8 squared = C squared. 64 + 64 = C squared. 128 = C squared. The square root of 128 = 11.3
10-13-2011, 07:11 AM
#29
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Originally Posted by QuiltE
Originally Posted by ShowMama
Does anyone know if there is a formula for figuring the diagonal measurement of a quilt block? Say, if I make an 8" square 9-patch block, is there a formula that I can use to figure the diagonal measurement from one corner to the opposite corner? Oh, I know I could just make a block and then measure it's diagonal, but was hoping there is some easy method to figure it out on paper. I'm wanting to make a quilt with sashed blocks on point and want it to end up a certain size, but don't exactly know how big to make my blocks and sashing. Any help would be appreciated.
Don't forget the seam allowances!
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