I'm trying to make corner triangles and the ones in between the tulip blocks. I'm having a hard time figuring out what size to cut them.

Can someone please help? I did this in EQ5.

block size is 12" (tulip)
inside rectangle is 38 X 50
1st border 4"
2nd border 6"

The quilt is supposed to be 58 x 70 finished

I sure would appreciate it. I'm trying to learn triangles like these, but just don't get it yet :cry:

Thanks!

Ok, that just made my head hurt!

Wouldn't the inside triangles be....ok. lets see if I can explain MY thinking on this.
Take a square, the same size at the tulips, then make a triangle out of it. That SHOULD be the size of what you need.
But, that's my thinking.
OR, this is what I'd do too....not sure anyone would agree with me...
I'd take a BIGGER triangle...sew it to the corner, then square it off. Then measure it, including the 1/4 in seam allowance that that would be the size you would need.
I'm probably way off on this, but in my head, it would work for me.
Does it make any sense???

For half square triangles, take the finished size and add 7/8 of an inch and cut a square that size, then cut in half diagonally from corner to corner. This would be for your corner triangles as the bias edges will be attched to the quilt and the outside edges will end up on the straight of grain.

For the smaller ones, you will want to cut those as 1/4 square trianges so the straight of grain is on the outside long edge. Sorry, I cant give you the math on that one.

You could cut a template and add the 1/4 inch seams, then measure it and see what it measures.

Ill see if I can find the math for those.

Someone else will probably be able to give you the answer before I can find it though

OK, I found it...
Quarter square triangles are cut using the finished size plus 1 1/4 inches.
Then cut in half on the diagonals both ways.... leaving the straight of grain on the long edge...

So,

For your big ones this is what I think...

Since your blocks are 12 inches and the triange spans two of them,
you would cut your square 24 7/8 inches and cut in half on the diagonal giving the big corner triangles.

The little ones are also based on this measurement, I think,, so
cut the square 25 1/4 and cut in half both ways giving you four triangles from each square with the straight of grain on the long edge.

I would do it with freezer paper first to make sure it fits..

Oh yeah, you need to measure your quilt blocks to make sure they ended up 12 inches as planned...

Judy

wow i cant help you with the math but that sure is going to be pretty when you are done remember to show it once you are done
is that from a book or did you design it ???

Let's see... The big corner triangles:

if you look at the upper left you have two blocks side by side they are 12.5 unfinished, and when you sew those two together they will be 24.5' Cut a Square with sides of 24.5" Now cut it twice diagonally each way. Now you have the four big corner triangles you needed. SIMPLE. :D Now here's a big tip. if your blocks are a little small and your triangle is a little bit big find the center of both, pin from the center out, this will put any extra in your seams.

The little Triangles on the sides:

These are easy. Your blocks are 12.5 unfinished. Therefore the two sides are 12.5. Take one 12.5' SQUARE cut it in half diagonally one time and you will have two of those little triangles. Since you need 6 of these little triangles cut 3 squares.

See no math. :D

I love this pattern it's beautiful!

Thank you ladies.

I bookmarked that site Loretta.

I have a dumb question..which one is the long edge? Is it the one that butts up to my tulip squares? (told you is was a dumb ?) :oops:

You could also figure out the size for the small triangles, then instead of making big triangles, make the big ones as two small ones with a centre seam, and they will be the exact same size as the other small ones. Sorry i cant figure the size, i would have just sewn them oversize and then trimmed :) But very very pretty quilt, just love it! :)

The long edge on the big ones is next to the blocks, the long edge on the little ones is the outside, not next to the blocks.

The other two sides will be equal..

if you can find Fons and Porters book on Quilting it will tell you how to do it It is a vert good reference book one I have used for 30+ yrs Good Luck I will try and look it up for you

Dosnt EQ5 tell you? Even cheapy Quilt Wizard gives you a pattern to go by.

I think this is what you are looking for . If your block is finished size 12 unches . Setting triangles should be cut 18.25 inches and cut diagonally into 4 triangles and your corner cut 9.375inches and cut diagonally in half I hope this helps try with some paper first to mke sure this is right Good Luck and Happy Quilting Andie

Here's another chart to bookmark - it has the most common sizes worked out.

http://www.karencombs.com/setting_triang.htm

Love her charts!! But she doesnt have the size you need for your corners, so here is the formula to use;

for side setting triangles ( 1/4 sq)- finished size of block times 1.4142 +1.25
corner setting triangles (1/2 sq)- finished block size divided by 1.4142 + 7/8

Thank you all sooo much! I got it done, and as soon as I square itup, I'll post a pic.

OK, here is the calculation....

For the setting triangles, take the finished size of the block x 1.414, round to the nearest 1/8 and add 1.25. Cut your square that size and cut on the diagonal both directions giving you four quarter square triangles

Your example:
12 x 1.414 = 16.968, round to 17 + 1.25. cut your square 18.25 and cut on the diagonal both directions.

For the corner triangle:
take the finishes size x 1.414 /2 + 7/8 cut in half on the diagonald

Your example:

Since your corners span two blocks, the finished size is 24 inches.

24 x 1.414 = 33.936 round to 34, divide by 2 = 17 & 7/8 = 17 7/8. Cut in half on the diagonal giving two half sqaure triangles.



I went to my cutting mat and measured.

You can follow this too and see that it is what you want.

Lets start with the corners.

The corner triangle spans TWO 12 inch blocks and you are going to want to make it from a half square triangle because you want the bias edge to be against your blocks and the straight of grain on the outside two sides.
So, the finished length of this seam across two 12 inch blocks is 24 inches.
Take your 24 inch ruler and go to your cutting mat and lay it diagonally across the corner at the 17 inch mark you see the size of the finished triangle is 17 x 17 x 24. So this is the size your triangle will be after sewing into your quilt. Now, you need a 1/4 seam allowance on the 17 inch side and 3/8 inch on the diagonal or 24 inch seam and another 1/4 inch for the other triangle. So, thats 7/8 inches added to the 17 inch measurement (17 7/8 inches) to get the size of the square. Cut this in half on the diagonal and that will give you your corner triangles.


What do you think?

Judy

Just saw your post that you got it done.
Cant wait to see it..

Thanks jstitch, I really appreciate your help! :D

If you're like me - I love setting blocks on point and equally love changing patterns around - check out the Fons and Porter Easy Diagonal Sets ruler. I'm not normally one to have a ton of specialty rulers, but this one I consider a must-have - the price has been well worth the saved aggravation for me! It does corner and side setting triangles; just follow your finished block size (ie: 12") and it tells you to cut 9" strips for your triangels - the ruler has the angles, you just lay it on your strip and cut, flip the ruler and cut again. IIRC, I got mine at Joann's with either a coupon or when they had their Fons and Porter stuff on sale.

Here, here, I agree

These rulers are the best... Marti Mitchel has one too. I think her's was the first one on the market

Either one is good and they are great as they allow you to cut your setting triangles from a strip intead of a square.


Judy

Yesterday I did get a Fons & Porter triangle ruler, but it is a 7.

i actually don't have any triangle rulers - do I need to get one?? and if so, what do I start with?? :?: