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# How do I do the math on this one??

09-03-2012, 03:45 PM
#1
Senior Member

Join Date: Aug 2009
Location: Alberta
Posts: 308
How do I do the math on this one??

I need to make 20 squares made from two triangles. The finished square is to be 1 5/8 inches by 1 5/8 inches. I would like to make it the fast way using two squares that are sewn together and then cut apart. My problem is trying to figure out what size the squares that I cut apart should be. Most charts don't go that small . I hear you just muiltiply by .64 but how do you do that with a number like 1 5/8?? Can any math whiz help me??
09-03-2012, 04:14 PM
#2
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Join Date: Aug 2011
Location: Louisville, KY
Posts: 1,293

So sorry; I am not the math whiz you are looking for! Good luck, however.
09-03-2012, 04:17 PM
#3
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Join Date: Feb 2009
Location: home again, after 27 yrs!
Posts: 19,388

http://www.patchwork-and-quilting.co...triangles.html
http://www.karencombs.com/formulas_for_quilters.htm
I'm assuming you need half square triangles
09-03-2012, 04:21 PM
#4
Senior Member

Join Date: Aug 2009
Location: Alberta
Posts: 308

Thanks! Looks like I make 2.5 inch squares!
09-04-2012, 03:50 AM
#5
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Join Date: Feb 2011
Location: Gloucester, Va
Posts: 430

It's probably not the correct way, but I when I cut the squares I just add 1" to the size I want it to end up ( 1 5/8 plus 1 = 2 5/8 ), then trim the HST back down. I hate fractions, can't you tell?
09-04-2012, 03:53 AM
#6
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Join Date: Mar 2011
Location: Central NJ
Posts: 5,498

Originally Posted by TwinRiverFarm
It's probably not the correct way, but I when I cut the squares I just add 1" to the size I want it to end up ( 1 5/8 plus 1 = 2 5/8 ), then trim the HST back down. I hate fractions, can't you tell?
Right there with you! Not sure if it's my cutting or stitching that's always off, but this way I get near perfect HST's. Takes a bit longer but much better results.
09-04-2012, 05:13 AM
#7
Senior Member

Join Date: Aug 2009
Location: Alberta
Posts: 308

Good idea. Give myself a little insurance. This is for a 12 Days of Christmas Wall hanging, so the squares would be very visable.
09-04-2012, 11:40 AM
#8
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Join Date: Apr 2010
Location: Turku, Finland
Posts: 596

Here are charts to help you, I love the bottom one to make 8 hst's at once!
Attached Files
09-04-2012, 11:55 AM
#9
Super Member

Join Date: Oct 2011
Posts: 1,111

Originally Posted by Gennynut
Thanks! Looks like I make 2.5 inch squares!
Yep. For 1/2 square triangles, add 5/8 to your finished measurement and cut that size. Multiplying by a number (like .64) will NOT work correctly.

1 5/8 + 7/8 = 1 12/8 = 2 4/8 = 2 1/2
09-05-2012, 06:50 AM
#10
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Join Date: Jan 2011
Location: Small town in Northeast Oregon close to Washington and Idaho
Posts: 2,794

I found out that I love cutting down triangles. I took an online class and she had us do that and it was so nice and ever since then, I make my HST a little bigger than suppose to be and cut them down. Love it!
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