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-   -   Quilting Math Question (https://www.quiltingboard.com/main-f1/quilting-math-question-t159919.html)

ube quilting 10-13-2011 02:34 PM
You all rock!

ube quilting 10-13-2011 02:36 PM
Originally Posted by luana
This is so cool!

madamekelly 10-13-2011 06:28 PM
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.
I had the exactly the same problem, but was fortunate at the time to have a 9 year old neighbor boy who told me the answer. He was right, but I don't know how he did it. Unfortunately he has moved away, or I would offer to ask him for you. My quilt ended up being 110 x 112, a perfect fit for me bed. Good luck.

ShowMama 10-14-2011 08:38 AM
Thank you all for your help in this. I knew there were some super intelligent quilters out there and that there had to be a formula for what I need. I do usually just draw everything out on graph paper, but this time I needed to know how to figure it backwards.

I'm going to be making a wedding quilt and the bride has a certain pattern in mind. It has sashed blocks on point, but her example isn't big enough for a bed quilt. I want to enlarge the block size so I won't have to make 700 small blocks to get a large queen quilt. Now I can figure out how many 8" or 10" blocks I would need to complete the pattern she's chosen.

Thanks again for all your help!

pattipat 10-14-2011 12:37 PM
Originally Posted by scraphq
For quick no-math measurements I measure diagonals on my cutting mat. Quick and easy, no brain strain. Don't forget to add seam allowances.
This is a lot easier for the math challenged. :thumbup:

cyd 10-14-2011 06:48 PM
Just be sure to add in seam allowances so all parts fit as desired

ccrow99 10-15-2011 05:26 AM
Ouch...my brain is hurting!! LMAO...

OB 10-15-2011 12:47 PM
Who said you don't use geometry in real life

sylvia776 10-16-2011 06:41 PM
Are you confused yet?????

annpryor 10-17-2011 04:13 PM
HOLY COW!!! YOU GUYS SCARE ME! HA! HA!


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