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Thread: On Point

  1. #1
    Junior Member Needle Up's Avatar
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    I am would like to find a tut on how to calculate triangles for setting blocks on point.

  2. #2
    Super Member auntpiggylpn's Avatar
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  3. #3
    Moderator QuiltnNan's Avatar
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    welcome to the board from minnesota and happy quilting :)

  4. #4
    Super Member Murphy's Avatar
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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"

  5. #5
    Super Member Murphy's Avatar
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    Hi and welcome to the board from Iowa.

  6. #6
    Senior Member
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    http://www.google.com/search?hl=en&s...l2-1.3.2.1l7l0

    Just google Setting Triangles Quilt

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