Measurement question for Math Whizes

[maryq]

Whilst playing with my Christmas fabric tonite, I found some very pretty stuff I forgot I had!! Imagine that!!! I want to make a table runner of it. SO I fussy cut 6 &1/2" squares, then cut fabric to make flying geese for each edge and they will be 3x 6 &1/2 but I'll need corner pieces.

Question is this How big should I cut squares to make 1/2 squares triangles for the corners? I'm thinking I'll just make HUGE ones then trim them down to fit.!!

HELP

Mary

[Evie]

If you have a large square of ruler, try using it to determine how big to make the squares before cutting on the diagonal. You could lay the ruler on top of it and angle it around like it's the fabric. I know, this is probably clear as mud. I can see it in my mind, but putting it down in words, oh well.

[Evie]

Here, try this page at Quilters Cache:

http://www.quilterscache.com/H/howtomak ... ngles.html

[maryq]

Thanks Evie

I knew I could count on my forum friends to help me out!!

Printed out info from Quitlerscache

[Kittyquilt9292]

OOOOHHHH, thank you thank you. I've needed this and voila, open the forum and there it is................Bless you, carol/kittyquilt

[maryq]

Gals

I found a GREAT chart for cutting setting triangles and HST and QST but I just don't remember where I found it! It's in my computer at a PDF file. I tried to copy/paste it here but it doesn't work!!! I might be able to attach to a regular e-mail... if anybody wants to see it let me know and send me your regular e-mail address!

If I can think of where I found it I'll let y'all know

MaryMargaret

[gardenquilter]

had a similar question not long ago sew bug posted this lickey split

Hope this helps.


Let's Cut Corner Triangles
We'll cut two corner triangles by slicing a square once from corner to corner.
Start by calculating the finished length of a block's diagonal.


Finished block size x 1.41 = finished diagonal

Divide the answer, the finished diagonal, by 2. Add 0.875" and round up to the nearest 1/8" to find your parent block size.

Cut two parent blocks that size and divide each in half once diagonally to make a total of four corner squares.
Corner Squares Example - for 10" quilt blocks


10" block size x 1.41 = , 14.10" finished diagonal
Parent square size = 14.10" / 2 = 7.05" + .875" = 7.925, round up to 8"


Corner Triangle Parent Squares for Common Quilt Block Sizes
4" blocks: use 3-3/4" parent squares

6" blocks: use 5-1/8" parent squares

9" blocks: use 7-1/4" parent squares

10" blocks: use 8" parent squares

12" blocks: use 9-3/8" parent squares

14" blocks: use 10-3/4" parent squares

15" blocks: use 11-1/2" parent squares

Let's Cut Setting Triangles
We'll cut a square twice diagonally to produce four setting triangles with the straight grain on their long edges.

Finished block size x 1.41 = finished length required on the triangle's longest edge. Round up to nearest 1/8".

Cut a square with sides that are 1-1/4" longer than the number in Step 1.

Cut the square in half twice diagonally.

Setting Triangle Parent Squares for Common Quilt Block Sizes
4" blocks: use 7" parent squares

6" blocks: use 9-3/4" parent squares

9" blocks: use 14" parent squares

10" blocks: use 15-3/8" parent squares

12" blocks: use 18-1/4" parent squares

15" blocks: use 22-1/2" parent squares

Setting Blocks
Squares of fabric placed between blocks are called setting blocks. Cut them to match the unfinished size of your quilt blocks.
10/12/2007 5:53:47 PM