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# triangles

01-15-2018, 04:48 AM
#1
Member

Join Date: Jan 2018
Posts: 1
triangles

Hi - I have a 61/2" block - finished it will be 6" - what size square do I cut - so that when it's cut diagonally it will make a diamond shape around the 6" square - I know there is a formula for this - but I have forgotten it and did not right it down.
01-15-2018, 05:31 AM
#2
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Join Date: Mar 2011
Location: western NY formerly MN, FL, NC, SC
Posts: 51,433

here is an online calculator for any size square in a square block. it works great.
01-15-2018, 05:33 AM
#3
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Join Date: Mar 2011
Location: western NY formerly MN, FL, NC, SC
Posts: 51,433

the calculator gives your square for triangles as 5 1/8 . I would cut it at 5 1/4 for easier measurement and then that leaves wiggle room to square up your final block
01-17-2018, 10:21 AM
#4
Super Member

Join Date: Feb 2011
Location: Houston, TX
Posts: 7,312

Originally Posted by QuiltnNan
here is an online calculator for any size square in a square block. it works great.
Now that is really useful! Thank you
01-17-2018, 06:02 PM
#5
Super Member

Join Date: May 2012
Location: S.E. Queensland, Australia
Posts: 1,167

If you mean a sq-in-a-square block, I would probably cut one 7 1/5" square, (1" larger) and recut twice on the diagonal, then sew one to each side.
01-17-2018, 06:50 PM
#6
Super Member

Join Date: Sep 2010
Location: Lake Stevens, WA
Posts: 1,902

Gay's solution leaves you with bias edges all around. Two 5 1/4" squares, each cut one diagonal, makes outer edges on straight grain.
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