Disappearing Nine Patch - Math help
 

Ok, so I want to make a disappearing nine patch...but how big do I
make the original squares so that my final piece ends up being 12"
finished? I came up with 4 2/3" and that is totally not making any
sense in my brain. I don't have the oomph to actually give it a try
and take it apart and redo it when I mess it up....

Thanks!
Dannielle

Disappearing Nine Patch - Math help
 

ok, I just can't resist.... (somebody had to say it) why would you care
about it if it's going to disappear...??

Judy
who had wine with dinner before going online

Disappearing Nine Patch - Math help
 

On Apr 27, 7:01*pm, Dannielle wrote:
Ok, so I want to make a disappearing nine patch...but how big do I
make the original squares so that my final piece ends up being 12"
finished? *I came up with 4 2/3" and that is totally not making any
sense in my brain. *I don't have the oomph to actually give it a try
and take it apart and redo it when I mess it up....

Thanks!
Dannielle

Less than 1/8" under 7", according to my math. I'd never heard of a
disappearing nine-patch, so I did a quick google, and what I found
suggested that you begin with 3 equal-sized 9-patches, then cut them
into quaters. After that... things differ, but one winds up sewing
the pieces back together into some final configuration. In your case,
you want that to be 12" square, right?

If this is what you're doing, then your final 12" square (144 sq. in.)
divided by 3 component 9-squares = 48 sq. in. ea. The square root of
48 (to make the original 9-patch squares) is a little less than 7.

So if you started with 7" blocks (after squaring, as described on the
sources I read), you should be in the ballpark, + or -.

Doc Smith

Disappearing Nine Patch - Math help
 

Dannielle wrote:
Ok, so I want to make a disappearing nine patch...but how big do I
make the original squares so that my final piece ends up being 12"
finished? I came up with 4 2/3" and that is totally not making any
sense in my brain. I don't have the oomph to actually give it a try
and take it apart and redo it when I mess it up....

Thanks!
Dannielle

You're right. The squares you start with should be 4 2/3".

No matter what size you want your D9P to be, the finished size of your
starting 9 patch always needs to be 1/2" larger than the finished size of
the final D9P. So if you want your D9P to be 12" finished then the starting
9 patch needs to be 12 1/2" finished. Divide 12 1/2" by 3 and you get 4.17".
Add your seam allowances and you get a starting patch of 4.67".
--
Jeri
"You can complain because roses have thorns, or you can rejoice because
thorns have roses." ~Ziggy~

Disappearing Nine Patch - Math help
 

On Apr 28, 1:58*am, "Jeri" wrote:
Dannielle wrote:
Ok, so I want to make a disappearing nine patch...but how big do I
make the original squares so that my final piece ends up being 12"
finished? *I came up with 4 2/3" and that is totally not making any
sense in my brain. *I don't have the oomph to actually give it a try
and take it apart and redo it when I mess it up....

Thanks!
Dannielle

You're right. The squares you start with should be 4 2/3".

No matter what size you want your D9P to be, the finished size of your
starting 9 patch always needs to be 1/2" larger than the finished size of
the final D9P. So if you want your D9P to be 12" finished then the starting
9 patch needs to be 12 1/2" finished. Divide 12 1/2" by 3 and you get 4.17".
Add your seam allowances and you get a starting patch of 4.67".
--
Jeri
"You can complain because roses have thorns, or you can rejoice because
thorns have roses." *~Ziggy~

Jeri,

Thanks! That really helps!

Dannielle

Disappearing Nine Patch - Math help
 

Alright! I just did one, I put the original squares at 4 3/4", cause
who on earth puts thirds on their rulers? NOBODY! With a scant 1/4"
seam allowance and the horizontal and vertical cuts at 6 1/2", once
sewn back together this block rocks!

I have decided that this might just be "THE" block for my black and
tan quilt. I will make it a different size, however, like start with
all 5" blocks and roll on from there. As long as they are all the
same, it shouldn't matter.

One of these days I will make a Yellow Brick Road quilt. I swear!

Dannielle




You're right. The squares you start with should be 4 2/3".

No matter what size you want your D9P to be, the finished size of your
starting 9 patch always needs to be 1/2" larger than the finished size of
the final D9P. So if you want your D9P to be 12" finished then the starting
9 patch needs to be 12 1/2" finished. Divide 12 1/2" by 3 and you get 4.17".
Add your seam allowances and you get a starting patch of 4.67".
--
Jeri
"You can complain because roses have thorns, or you can rejoice because
thorns have roses." *~Ziggy~

Disappearing Nine Patch - Math help
 

I'm with you, Dannielle. If we were doing one of our Pat on Her Hill's
creations, I just might be willing to cut something point oh something - but
for the 9-patch? Heck no. Just couldn't matter that much. Today I came
across a recipe that called for 2/3 of a teaspoon. Decided a generous heap
of one-half ought to do. Has anybody ever even seen a measuring spoon for
thirds? Polly


"dbeitzell" wroteAlright! I just did one, I put the original squares at 4
3/4", cause
who on earth puts thirds on their rulers? NOBODY! With a scant 1/4"
seam allowance and the horizontal and vertical cuts at 6 1/2", once
sewn back together this block rocks!

I have decided that this might just be "THE" block for my black and
tan quilt. I will make it a different size, however, like start with
all 5" blocks and roll on from there. As long as they are all the
same, it shouldn't matter.

One of these days I will make a Yellow Brick Road quilt. I swear!

Disappearing Nine Patch - Math help
 

Hi Polly,
Not 2/3 tsp, but I have a set for "a smidgen", "a pinch" and "a dash.
Never used them, easier to do a shake.
Anna Belle


On Tue, 28 Apr 2009 22:18:16 -0500, "Polly Esther"
wrote:

I'm with you, Dannielle. If we were doing one of our Pat on Her Hill's
creations, I just might be willing to cut something point oh something - but
for the 9-patch? Heck no. Just couldn't matter that much. Today I came
across a recipe that called for 2/3 of a teaspoon. Decided a generous heap
of one-half ought to do. Has anybody ever even seen a measuring spoon for
thirds? Polly


"dbeitzell" wroteAlright! I just did one, I put the original squares at 4
3/4", cause
who on earth puts thirds on their rulers? NOBODY! With a scant 1/4"
seam allowance and the horizontal and vertical cuts at 6 1/2", once
sewn back together this block rocks!

I have decided that this might just be "THE" block for my black and
tan quilt. I will make it a different size, however, like start with
all 5" blocks and roll on from there. As long as they are all the
same, it shouldn't matter.

One of these days I will make a Yellow Brick Road quilt. I swear!

Disappearing Nine Patch - Math help
 

On Apr 28, 3:06*pm, dbeitzell wrote:
snip
who on earth puts thirds on their rulers? *NOBODY!

Umm... Nerds do, of course. What you want is an "engineering
scale" (or rule) - not an "architectural scale".
http://en.wikipedia.org/wiki/Engineer's_scale
You can find them at engineering and/or art supply stores. It's a
ruler with a triangular cross-section. One of the scales is 30 ft. to
the inch, so one third of an inch is 10' on the scale. DW
appropriated one of mine for... get this... QUILTING!
Nowadays, it should be easy enough to create & print one out on your
computer.

But if your printer isn't accurate enough, (or you're stuck on that
desert island your math teacher always warned you about...) there's an
old trick I learned in design class that will get the job done.

1. On a piece of paper (or label stock if you plan to stick it on the
end of a ruler for future use) draw two parallel vertical lines about
6" long, exactly one inch apart.
2. Near the bottom of the two lines, line your standard ruler up at an
angle so that the one inch mark is on the first (left) line, and the
2-1/2" mark is on the second (right) line. Make tick-marks at 1-1/2"
and 2".
3. Repeat step 2 near the top of the two lines.
4. Draw vertical lines through the two sets of tick marks.

You now have an inch divided EXACTLY (or as nearly as practical) into
thirds. The same method can be used to divide an inch into just about
any number of equal parts. Fifths of an inch? - no problem - or use
the 50 scale on the engineering scale above. ;-)

Doc Smith

Disappearing Nine Patch - Math help
 

I have the smidgen, pinch, and dash measures too.
DH re-measured them all it in terms of the old apothocary measures to
make his life easier.

There is nothing like finding that a needed measurement is measured in
thirds or further fractions thereof to make me wish the US would
either get with the program and go metric, or make greater use of
older measures like drams. I have thirds of a cup marked on my one
pint pyrex measureing cup, but anything smaller and it is by guess and
by golly.

Sometimes when both of us are cooking and making notes on what we are
doing at the same time, all the standard measuring tools wind up in
use. So DH in particular (because I am meaner (G)) has a few recipes
he worked out recorded entirely in gills, drams, grains, scruples, and
etc.

NightMist

On Wed, 29 Apr 2009 07:46:10 -0400, "Anna Belle"
wrote:

Hi Polly,
Not 2/3 tsp, but I have a set for "a smidgen", "a pinch" and "a dash.
Never used them, easier to do a shake.
Anna Belle


On Tue, 28 Apr 2009 22:18:16 -0500, "Polly Esther"
wrote:

I'm with you, Dannielle. If we were doing one of our Pat on Her Hill's
creations, I just might be willing to cut something point oh something - but
for the 9-patch? Heck no. Just couldn't matter that much. Today I came
across a recipe that called for 2/3 of a teaspoon. Decided a generous heap
of one-half ought to do. Has anybody ever even seen a measuring spoon for
thirds? Polly


"dbeitzell" wroteAlright! I just did one, I put the original squares at 4
3/4", cause
who on earth puts thirds on their rulers? NOBODY! With a scant 1/4"
seam allowance and the horizontal and vertical cuts at 6 1/2", once
sewn back together this block rocks!

I have decided that this might just be "THE" block for my black and
tan quilt. I will make it a different size, however, like start with
all 5" blocks and roll on from there. As long as they are all the
same, it shouldn't matter.

One of these days I will make a Yellow Brick Road quilt. I swear!




--

Nothing has been the same since that house fell on my sister.