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Topic: I need help with measuring and cutting (star quilt)...  (Read 1306 times)
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« on: November 10, 2010 10:41:55 AM »

Hello everyone... so, I'm totally a newb to quilting. Since my current projects have a "this is how much fabric you get, no do-overs" I'm stressing out over measurements and cutting and wanted to get second/third/fourth opinions... lol.

My sister and I were browsing and she wants to use this as her inspiration (please, if anyone knows the webpage/quilter to give credit to, let me know. We were browsing on my phone and I didn't have the ability, or perhaps just the knowledge, on how to save the webpage to give credit from there):

It looks like a slightly more complicated version of an Ohio Star but I honestly have no idea what it's called.

My question is this... I want the center squares to be 4" finished so I'm cutting them to be 4.5" squared. Then the squares with the quarter triangles will be cut at 5.25" unfinished to make them work with the seam allowances. The smaller 1/8-sized squares will be cut from larger 5" blocks to get the seam allowances correct when I quarter them. But now here's my problem...

What size are the smallest 1/8-sized triangles cut down from? I just cannot wrap my head around accounting for the seam allowances and even drawing everything out on graph paper is no help.

To clarify, in the picture, the lower left hand block, I'm trying to figure out how to cut the smallest brown (and cream) triangles, what size should those unfinished, uncut, larger blocks be?
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« Reply #1 on: November 10, 2010 09:00:33 PM »

ok.  first.  breathe.
long answer-
this star is a nine patch.  so the left hand corner block you are talking about will have 4 smaller units to make up a 4.5 unfinished square to go in the block...

so you have a 2.5 square of  pink, a 2,5 square of white and two half square triangle units at 2.5 each. (originally  at 2+7/8ths)


to make half square triangles use this formula...add 7/8" to the size of the square.

to make quarter square triangles.  use this one.-Add 1-1/4" to the finished dimension

re reading this it doesnt feel to clear.  check out the simple quick piecing methods. ... and feel free to ask more questions.

short answer. cut small half triangles 2 7/8ths. Smiley


Stupid men are often capable of things the clever would not dare to contemplate- Terry Pratchett
« Reply #2 on: November 11, 2010 05:55:58 PM »

Thanks Smiley I think it makes sense, but I'll have to get my fabric out again and take a look before I'll be able to wrap my head around it... lol. Such a hands-on learner.
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« Reply #3 on: November 11, 2010 08:19:14 PM »

EZ Quilting makes special rulers that make the measuring and math easier for 1/2 square and 1/4 square triangles - I use them all the time. Their EZ Angle is for cutting half-square triangles, and the Companion Angle is for the quarter square triangles.  For this quilt, you would cut strips 2 1/2" wide, then cut out the triangles.  It is really easy, and you don't have the hassle of measuring that 7/8"!

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