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Thread: quick way to create half square triangles

  1. #226

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    Hi Oma66:
    I love halfsquare tri's. Thank you so much for sharing this with we who had not heard of this method. What a
    great idea.

    Not that it matters but the Gma below stands for being grandmother to 6 (triplets, twins and a single), who call me G-ma (short for Grandma), and the GG is for being great-grandmother to four who know me as GeeGee. The last four couldn't call me Grandma because that's what they call my daughters. Anyway, quicker half-square triangles will make 4 new quilts (they're no longer infants) go much faster! All I have to do is use 4 different combos of color.
    Thanks again! Gma-GeeGee

  2. #227
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    The math for this is start with the squares 1 1/2 times larger than the finished size.

    2 times the diagonal of the size you want divided by 1.414 = exact size to cut large square.


    If you wanted a 4" sq double to get the diagonal which would be 8" divide by 1.414 or (1.5 and trim later) = size of starting square to use.

    In case I forget the math look at the diagonal on the cutting mat and count the squares.

  3. #228
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    This is what I mean by looking at the mat. If I wanted a 9" sq finished the starting sq would be 13. Add 1/2 total for seam allowance.
    Attached Images Attached Images

  4. #229
    a regular here Donna Mare's Avatar
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    WOW>>>that easy? Amazing....thank you for that tut! Bookmarking it and also saving the pics, just incase! Thank YOU!!

  5. #230

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    I heard about this from a friend but could someone provide numbers to make different sizes. Right now I take 2 pieces put right sides together to check what size I get; for example: 12-1/2" will make 4 each- 8 1/2. This also makes a 16 1/2 pinwheel.

  6. #231

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    Sorry, I read on and found out.

  7. #232
    Junior Member Rn8or's Avatar
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    This seriously changes (part of) my life!

  8. #233
    Member lostsoulhelpmejebus's Avatar
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    Beginning Square Size x 0.64 = HST size

    or

    HST / 0.64 = Beginning Square Size

  9. #234
    Super Member pjnesler's Avatar
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    I've use this technique quite a few times in verious sizes - always use BestPress, and have never had a problem - Soooooo Nice and Fast!

  10. #235
    Junior Member sew1096's Avatar
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    I had not heard of this way to make HST before. I like it. It is similar to the way I make mine. I get 8 HST out of my squares and not on the bias.

    I don't have pictures and don't know if I can explain it well but..... I also start with 2 squares of fabric and mark diagonal lines from the corners (my lines would be where this way shows you cut). I sew 1/4" away from the drawn lines. Then I cut along the lines (in an X) and also across both ways (in a +) This gives me 8 HST.

    To figure out size - take the finished size wanted and double it then add 2" for seam allowances. 2 x 2 + 2 = 6" squares for 2" finished or 3 x 2 + 2 = 8" squares for 3" finished.

    I always make mine this way when I have a lot of HST's to make for a project.
    Shari

  11. #236
    Super Member AngieS's Avatar
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    This is neat. Love it!
    Angie S.

  12. #237
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    I haven't seen it done exactly like this. Thanks for posting it.

  13. #238
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    I've seen this several times on here and on you tube but have yet had anyone explain how to do it when you need a certain size triangle. Like the one method you just add 7/8 to what ever the finished size that is needed. But this one how do you measure the block if you want a specific size half square.
    Judy

  14. #239
    Super Member Abby'smom's Avatar
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    thank you -- making 4 at a time is better than just 2!
    diane

  15. #240
    Junior Member lheizen's Avatar
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    I want the completed square to be 12 1/2 so how big should the blocks of fabric that you sew a round and cut be my math is terrible
    TIA
    http://www.facebook.com/pages/Fresno-CA/Gingerbread-Creations-Boutique/198849646808507

  16. #241
    Senior Member Quilted Dogs's Avatar
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    This is nice, thank u so much
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  17. #242
    Senior Member Quilted Dogs's Avatar
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    Quote Originally Posted by oma66 View Post
    I cut 91/2 in squares and ended up with 6 1/2 in half square triangle blocks.
    How do u figure the size for the squares, is there a formula or what.....so if I wanted to us charm square size 5" but would have to b 5 and a half.......just wondering how it is figured if u can help
    http://signatures.mylivesignature.co...C68D6DB95A.png
    Quilting With A Friend Will Keep You In Stitches

  18. #243
    Super Member wanda lou's Avatar
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    Thank you!
    Never look down on anyone, unless you are helping them up.

  19. #244
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    Thanks for information, I'm a newbie in quilting.

  20. #245
    Super Member fred singer's Avatar
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    great way to make pin-wheels
    Pegg


    Have a great day and happy sewing !

  21. #246
    Junior Member Quilt Fan's Avatar
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    One can cut 9 1/2 inch bias strips (or what ever size beginning square you want) and cut squares from those. That gives the beginning squares on bias. When done sewing together and cutting, outside edges will be on straight grain.
    Quote Originally Posted by quiltsRfun View Post
    Just be careful they don't stretch since all your outside edges are on the bias.

  22. #247
    Senior Member sonisew's Avatar
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    Thanks So much for the tutorial! Now making these will go so much faster.
    SoniSew

  23. #248
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    This is great, Thanks!
    SueDor

  24. #249
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    Sweet. Thanks for sharing.

  25. #250
    Member Beulah's Avatar
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    Great method. I am going to do this on my next quilt which calls of many many HST. Thanks.

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