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

1. ## 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.

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. 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. 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. Originally Posted by Maureen NJ
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. Originally Posted by Maureen NJ
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. 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.

7. 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. Originally Posted by Trisher
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 -

9. 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. Originally Posted by Trisher
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. Originally Posted by dunster
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. Originally Posted by dunster
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. 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.

14. 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:

15. 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. Trish I'm so happy for you!
I'm so challenged that I can't figure anything out but knew someone else would.