Block size? Check my math please?
#1
I want to make a 9 patch block. If my finished block will be 12" then I should make my blocks all 4.5"? I will have 1/4" seams which would end up with 3 x 4" per row?
OK... now I want to set the blocks on point so they will be set in as diamonds instead of running with the seams horizontally. I want to set 6 diamonds (which are my 9 patch blocks) running down a column. My question is about the half-square I will need to put between each 'diamond', as well as the small triangle at the top of each strip
My block is 12.5" (12"finished size plus 1/4" seam allowance on each side. Do I cut a block 12.5" then cut into 2 large triangles, to make the pieces I need to set in? For some reason I'm thinking that will make it too short on one side?? And what about that little triangle I need to cut for the top corners? UGH!! Right now I'm suffering from "Paralysis by Analysis"
:roll: Please.... I need your input!
OK... now I want to set the blocks on point so they will be set in as diamonds instead of running with the seams horizontally. I want to set 6 diamonds (which are my 9 patch blocks) running down a column. My question is about the half-square I will need to put between each 'diamond', as well as the small triangle at the top of each strip
My block is 12.5" (12"finished size plus 1/4" seam allowance on each side. Do I cut a block 12.5" then cut into 2 large triangles, to make the pieces I need to set in? For some reason I'm thinking that will make it too short on one side?? And what about that little triangle I need to cut for the top corners? UGH!! Right now I'm suffering from "Paralysis by Analysis"
:roll: Please.... I need your input!
#3
Super Member
Join Date: Aug 2009
Location: The middle of an IL cornfield
Posts: 7,014
http://www.karencombs.com/setting_triang.htm
This chart will help with the setting triangles.
As for the 9 patch blocks, each square needs to be 4.5 inches. With your seam allowance you should end up with a 12.5 unfinished block or a 12 inch finished block.
This chart will help with the setting triangles.
As for the 9 patch blocks, each square needs to be 4.5 inches. With your seam allowance you should end up with a 12.5 unfinished block or a 12 inch finished block.
#4
Super Member
Join Date: Apr 2009
Posts: 3,382
For the ? triangle, you'll want to use a 1/2 square triangle (i.e. a square cut in half diagonally. For the others, you want to use 1/4" square tirangles (i.e. a square cut across both diagonals). This will give you the correct non-bias edges.
#5
Super Member
Join Date: Mar 2009
Location: Maryville, Tn
Posts: 1,786
Yes.. the squares for the 9 patch should be 4.5" each.. the solid triangles should be 12 5/8" squares cut in 1/2 from corner to corner for the side blocks. I don't have the corner triangles figured yet. will let you know about those. I'm thinking you would cut a 13" block then cut corner to corner both directions to make those.. but I need to "prove" that out.
#9
Lisa - Thank you for that chart! It's going right into my reference binder!
MyTwoPals - I hadn't even taken bias into consideration!
Tippy- I hadn't thought of cutting paper templates....oh... I need a coffee so bad! So a 13" block cut in half from corner to corner will give me the big "what size?" triangle that I had drawn? - I am such a "visual" learner! Show me and I get it - tell me and I'll misunderstand you in 20 ways.... drives my family bonkers!
I'm glad I was able to calculate the small blocks for the 9Patch correctly! LOL! Did you ever have one of those days when you weren't just 100% confident in your skills? Today definitely qualifies! :)
MyTwoPals - I hadn't even taken bias into consideration!
Tippy- I hadn't thought of cutting paper templates....oh... I need a coffee so bad! So a 13" block cut in half from corner to corner will give me the big "what size?" triangle that I had drawn? - I am such a "visual" learner! Show me and I get it - tell me and I'll misunderstand you in 20 ways.... drives my family bonkers!
I'm glad I was able to calculate the small blocks for the 9Patch correctly! LOL! Did you ever have one of those days when you weren't just 100% confident in your skills? Today definitely qualifies! :)
#10
Uhoh.... I was replying at the same time as you were typing ToniMarie.
So if I cut a block 18+1/4" and then cut it corner-to-corner twice.... then I get FOUR triangles that would fit in? NOW I understand that chart a little better!!! HAHA! OMG.... I'm going for a chocolate break - I think 2 days of dieting is affecting my concentration!
So if I cut a block 18+1/4" and then cut it corner-to-corner twice.... then I get FOUR triangles that would fit in? NOW I understand that chart a little better!!! HAHA! OMG.... I'm going for a chocolate break - I think 2 days of dieting is affecting my concentration!
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