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Thread: Help again... with figuring out the math

  1. #1
    Senior Member Trisher's Avatar
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    Help again... with figuring out the math

    Hello, it's me again!

    Thanks to the wonderful members on this Board, I found tutorials etc on making a granny square block. I only want one block (for a sampler) not a quilt. I made the block in the photo below this afternoon.

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    I made up a a couple of blocks like this, but one finished way too small (6.5"). The next finished too big! Setting it on point makes it hard for me to do the math....

    I need 41 squares and have no idea how big they should be. Sigh.

    The block needs to finish at 12.5 inches (will be 12 inches when sewn into quilt). Can someone tell me how to figure this out?

    Thanks (I have just purchased EQ7 but I am still working on the beginner tutorials....)

    Trish

  2. #2
    Super Member Maureen NJ's Avatar
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    Trish, if you look at your picture, you will see that there are 4 squares on the diagonal. You want a finished square with a diagonal of 3". I went to my favorite site and it shows the square will be 2 1/8" finished. You will need to cut the squares 2 3/8". Be sure to check for 1/4" accuracy. Hope this is helpful.

    http://www.mathopenref.com/squarediagonals.html

  3. #3
    Super Member Maureen NJ's Avatar
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    Just re-read what I wrote and don't think I made myself clear. You have 4 squares on the diagonal going across and 4 squares down that need to equal 12" finished. 12 divided by 4 = 3, the diagonal measurement.

    Another link i like is Bonnie Hunters:
    http://quiltville.com/onpointmath.shtml

  4. #4
    Senior Member Trisher's Avatar
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    Quote Originally Posted by Maureen NJ View Post
    Just re-read what I wrote and don't think I made myself clear. You have 4 squares on the diagonal going across and 4 squares down that need to equal 12" finished. 12 divided by 4 = 3, the diagonal measurement.

    Another link i like is Bonnie Hunters:
    http://quiltville.com/onpointmath.shtml
    Thanks so much! I think I can wrap my head around that!

    But maybe not.... what about the white squares (which will become triangles when I trim them)?

  5. #5
    Super Member EasyPeezy's Avatar
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    Quote Originally Posted by Maureen NJ View Post
    Trish, if you look at your picture, you will see that there are 4 squares on the diagonal. You want a finished square with a diagonal of 3". I went to my favorite site and it shows the square will be 2 1/8" finished. You will need to cut the squares 2 3/8". Be sure to check for 1/4" accuracy. Hope this is helpful.

    http://www.mathopenref.com/squarediagonals.html

    If the finished size is 2 1/8", shouldn't the cut squares be 2 1/8" + 1/2"= 2 5/8"?

  6. #6
    Super Member EasyPeezy's Avatar
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    Nice block, Trisher.

    Edit: Forgot to mention that you should cut your white squares
    same as the rest of the squares just like you did before. Then
    trim 1/4" from the points. Check the tutorial I posted earlier.
    Last edited by EasyPeezy; 08-18-2017 at 04:09 PM.

  7. #7
    Power Poster dunster's Avatar
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    Maureen, you only added 1/4" for the seam allowances. You need 1/2" (1/4" on each side) so the squares should be cut at 2 5/8".

  8. #8
    Power Poster dunster's Avatar
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    Quote Originally Posted by Trisher View Post
    Thanks so much! I think I can wrap my head around that!

    But maybe not.... what about the white squares (which will become triangles when I trim them)?
    from Eq7 -
    Attached Images Attached Images

  9. #9
    Senior Member Trisher's Avatar
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    Thanks all... so Dunster... if I use triangles would that involve sewing a y seam? Thanks for your work on my behalf!

    One day EQ7 will do that for me .

  10. #10
    Power Poster dunster's Avatar
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    Quote Originally Posted by Trisher View Post
    Thanks all... so Dunster... if I use triangles would that involve sewing a y seam? Thanks for your work on my behalf!

    One day EQ7 will do that for me .
    No, you don't need any y seams. You assemble the block's diagonal rows with the setting triangles added in with each row, then sew the diagonal rows together. It's the same as with a quilt that's on point.

  11. #11
    Senior Member Trisher's Avatar
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    Quote Originally Posted by dunster View Post
    No, you don't need any y seams. You assemble the block's diagonal rows with the setting triangles added in with each row, then sew the diagonal rows together. It's the same as with a quilt that's on point.
    Thanks! I am learning so much!

  12. #12
    Super Member Maureen NJ's Avatar
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    Quote Originally Posted by dunster View Post
    Maureen, you only added 1/4" for the seam allowances. You need 1/2" (1/4" on each side) so the squares should be cut at 2 5/8".
    Dunster, you are so right! What was I thinking.

  13. #13
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    Dunster....good job. I was working on the block too.

    Trisher....Here's a copy of my EQ file. Save a copy on your computer and that way you can see what I did and recolor if you want. When I save an EQ file, it goes to
    My EQ>>PJ7

    Edited to add: I have never had a problem attaching a file, but for some computer reason, today I cannot. If you want a copy of the EQ file, please PM me your email and I will send the EQ file to you as an attachment.
    Last edited by Barb in Louisiana; 08-18-2017 at 06:12 PM.
    Sew a Little, Love a Lot & Live like you were dying!

  14. #14
    Senior Member Trisher's Avatar
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    Thanks Barb!

    I was able to finish the block to an (almost) perfect 12.5 inch square! Thanks everybody for all the math, the tutorials and EQ help. Here is my finished block:

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  15. #15
    Power Poster Prism99's Avatar
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    If it's a little short of 12.5", it's probably a matter of pressing all the seams completely flat. With so many seams in the block, the little bits of "non-flatness" in each seam add up.

  16. #16
    Super Member SusieQOH's Avatar
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    Trish I'm so happy for you!
    I'm so challenged that I can't figure anything out but knew someone else would.
    I love your block!!

  17. #17
    Power Poster ckcowl's Avatar
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    Your block turned out great. A good pressing will probably make it perfect. It is so wonderful to find all the helpful information here on the board - keeps us learning and being successful. Now I want to make those blocks. I love your fabrics.
    hiding away in my stash where i'm warm, safe and happy

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