I am would like to find a tut on how to calculate triangles for setting blocks on point.
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welcome to the board from minnesota and happy quilting :)
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Let's Cut Corner Triangles
We'll cut two corner triangles by slicing a square once from corner to corner. Start by calculating the finished length of a block's diagonal. 1. Finished block size x 1.41 = finished diagonal 2. Divide the answer, the finished diagonal, by 2. Add 0.875" and round up to the nearest 1/8" to find your parent block size. 3. Cut two parent blocks that size and divide each in half once diagonally to make a total of four corner squares. Corner Squares Example - for 10" quilt blocks 10" block size x 1.41 = , 14.10" finished diagonal Parent square size = 14.10" / 2 = 7.05" + .875" = 7.925, round up to 8" Corner Triangle Parent Squares for Common Quilt Block Sizes Corner Triangle Parent Squares for Common Quilt Block Sizes 4" blocks: use 3-3/4" parent squares 6" blocks: use 5-1/8" parent squares 9" blocks: use 7-1/4" parent squares 10" blocks: use 8" parent squares 12" blocks: use 9-3/8" parent squares 14" blocks: use 10-3/4" parent squares 15" blocks: use 11-1/2" parent squares Let's Cut Setting Triangles We'll cut a square twice diagonally to produce four setting triangles with the straight grain on their long edges. 1. Finished block size x 1.41 = finished length required on the triangle's longest edge. Round up to nearest 1/8". 2. Cut a square with sides that are 1-1/4" longer than the number in Step 1. 3. Cut the square in half twice diagonally. Setting Triangle Parent Squares for Common Quilt Block Sizes 4" blocks: use 7" parent squares 6" blocks: use 9-3/4" parent squares 9" blocks: use 14" parent squares 10" blocks: use 15-3/8" parent squares 12" blocks: use 18-1/4" parent squares 15" blocks: use 22-1/2" parent squares Setting Blocks Squares of fabric placed between blocks are called setting blocks. Cut them to match the unfinished size of your quilt blocks. Decimal to Fraction Chart - 1/8" 0.125 = 1/8" 0.250 = 2/8" or 1/4" 0.375 = 3/8" 0.500 = 4/8" or 2/4" or 1/2" 0.625 = 5/8" 0.75 = 6/8" or 3/4" 0.875 = 7/8" |
Hi and welcome to the board from Iowa.
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