Can someone answer this question?
 

Are there actual "patterns" for setting triangles and corner triangles? The blocks that I need them for are pretty large, 19". I wanted to do something different than just one solid piece. I don't quite know how to go about it. Do you just find a solid square block pattern an cut it? I know how to do the right measurements, but cutting it into fours is the problem I have. Any suggestions?

I work with scraps and make sample blocks until I get the look and correct size. Me and math don't get along so good:)

There is a ruler that uses strips of fabric to cut the triangles for on point quilts. It does 19 inch blocks. It is the EZ Flip and Set ruler. If you do a lot of on point quilts it's worth the money.

Oh, I just re-read your post and the light came on (grin). You want a pieced block that you can cut into the triangles and quarter triangles for the ends of the rows..... Most that I have seen are appliqued or a pretty patterned fabric. Good luck on your adventure and let us see your results!

I don't know of such a technique. I would draw out on graft paper the design I want for the triangles and then measure each separate piece in the design and then make the block. Appears to me that it would be difficult to make one that you can cut in half.

Is this what you're asking?
Do these two diagrams help?

Jan in VA

1st = diagram of blocks set on point.
2nd = diagram of a side setting triangle with extra pieced block inserted to break up the large size of the triangle.

Yes, that helps. I think sometimes the answer is right there in front of my nose, but I don't know how to go about thinking it through the right way. Thanks for your help! I'll get out some graph paper and give it a try.

I hope this will help you.

Finished Block size = _______

Setting Triangles:
1. Finished Block size x 1.414 (round to nearest 1/8”) = Finished diagonal
2. Add 1.25” (or 1 1/4”) to Finished diagonal measurement to obtain the size of the square to cut.
3. Cut one square and cut in half diagonally TWICE for four setting triangles. Repeat to cut the number of setting triangles needed.


Corner Triangles:
1. Finished Diagonal of block ÷ 2 = Finished short side of Corner Triangle.
2. Add .875 (or 7/8”) .
3. Cut two squares in half diagonally ONCE for four corner triangles.



Setting Squares: Finished Block size + .5 (or 1/2”)
________________________________________
EXAMPLE:
Finished block size = 6"
Setting Triangles: 6 x 1.414 = 8.48 (round up to 8.50)
8.50 + 1.25 = 9.75 (or 9 3/4")
Size to cut square, 9 3/4"
Corner Triangles: 8.50 ÷ 2 = 4.25
4.25 + .875 = 5.125 (or 5 1/8")
Size to cut square, 5 1/8"
Setting Squares: 6 + .5 = 6.5 (or 6 1/2")
Size to cut squares, 6 1/2"
Decimals to Fractions
.125 1/8
.25 1/4
.375 3/8
.5 1/2
.625 5/8
.75 3/4
.875 7/8