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Figuring 1/4 Sq Triangle Size Help Please

Figuring 1/4 Sq Triangle Size Help Please

Old 12-21-2012, 02:37 PM
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Default Figuring 1/4 Sq Triangle Size Help Please

I'm finally starting to sew again, making an applique butterfly baby quilt.

The directions however are kind of strange... Was to cut 10 1/2" strips, then making 10 1/2" squares, and then getting 4 triangles (template) out of one square - but the template that was included is 6 3/4" on the short side - no way could you get 4 of them from one 10 1/2" square. ??

The pattern is 4 1/4 square triangles sewn together to make one block, and then the applique square block is 9 3/4" square.

So I need to know the size I need of a 1/4 square triangle (using 4 of them) that be the same size as a 9 3/4" block. I just can't cut the 10 1/2" square into 4 triangles, or they wouldn't be big enough!

I hope this is clear enough for someone to figure out what I'm asking! lol!!!!
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Old 12-21-2012, 02:50 PM
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To figure the size of the square used to cut a QST, you add 1.25" to the finished size of the block you want to create. If your block's finished size is 9.75", you would need a square that is 11". I assume that your 9.75" block is unfinished, so finished it would be 9.25", and adding 1.25" you get 10.5", which is what the pattern calls for.

You can look at this link for the math - http://www.twthreads.com/pdf_files/HSTmath.pdf
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Old 12-21-2012, 02:55 PM
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thanks for the link. good info for me. I always wondered how you figured the size, especially without a pattern.
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Old 12-21-2012, 03:34 PM
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Thank you Dunster! How do I get the 4 triangles out of the 10.5 square though? It would be too small to use thier template.... Just got it into quarters?
Yes, my applique 'unfinished' block is 9 3/4".
Geez - can you tell it's been awhile since I did any of this? lol!!! Plus, I'm clueless when it comes to any math.
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Old 12-21-2012, 03:51 PM
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Cut it on each diagonal as it's shown in the link. Each triangle should be the size of their template.
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Old 12-21-2012, 04:13 PM
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Ok, I'll give it a try.... Laying their template on the 10.5" square though, I 'd only be able to get 2 maybe. I'll go do it now!
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Old 12-21-2012, 07:27 PM
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Look through this tutorial and see if it doesn't help you with triangle issues including these.

Jan in VA
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Using_Triangles.pdf (55.6 KB, 93 views)
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Old 12-21-2012, 07:53 PM
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Originally Posted by MollieSue View Post
Ok, I'll give it a try.... Laying their template on the 10.5" square though, I 'd only be able to get 2 maybe. I'll go do it now!
You will cut without the template, but if you place it so that its long side is along the edge of the square, you will see how 4 of them will fit (each with its long side along the edge of the square).
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