Go Back  Quiltingboard Forums >
  • Main
  • Darn math!! >
  • Darn math!!

  • Darn math!!

    Thread Tools
     
    Old 08-09-2013, 04:36 PM
      #1  
    Super Member
    Thread Starter
     
    sustraley's Avatar
     
    Join Date: Nov 2010
    Location: Illinois
    Posts: 2,210
    Default Darn math!!

    Can someone please help me? I have an 8 inch center piece of fabric. I want to make the unfinished block to be 12 1/2. I want to sew half square triangles to the 4 sides to make a square in a square. What size do I cut the squares for the half square triangles?
    sustraley is offline  
    Old 08-09-2013, 07:15 PM
      #2  
    Power Poster
     
    dunster's Avatar
     
    Join Date: Mar 2009
    Location: Lake Elsinore, CA
    Posts: 15,239
    Default

    Sorry, can't be done. For a 12" finished block that is a square in a square, the finished HST's measure 6" on each side. (Cut each from a square that is 6 7/8", or from a 7" square and then cut down the HST.) But the center square needs to be almost 8.5" finished, or 9" unfinished.
    dunster is offline  
    Old 08-09-2013, 07:32 PM
      #3  
    Super Member
     
    GingerK's Avatar
     
    Join Date: Jul 2010
    Location: Ontario, Canada
    Posts: 3,584
    Default

    Question, is the center block 8 inches finished or unfinished?? Secondly, you want the center block to be square and then the side blocks to form a diamond around it and then a square around that, right??

    If that is the case, you will be working with 60 degree angles. Much better to make the block 16 inches because the math becomes very simple. It would be a sawtooth star with the side pieces inverted.

    Last edited by GingerK; 08-09-2013 at 07:36 PM.
    GingerK is offline  
    Old 08-09-2013, 07:34 PM
      #4  
    Junior Member
     
    Join Date: Feb 2012
    Location: Western Catskills
    Posts: 138
    Default

    It can be done if the center square (which I assume is 7.5", finished) "floats" in the outer triangles, which would have to be cut somewhat bigger to make up for the smallish center square. Not the conventional square in square, but attractive (and still a 'square in a square'). If I have a moment tomorrow morning, I'll try to work out how big those triangles need to be.
    nanibi is offline  
    Old 08-09-2013, 07:42 PM
      #5  
    Super Member
    Thread Starter
     
    sustraley's Avatar
     
    Join Date: Nov 2010
    Location: Illinois
    Posts: 2,210
    Default

    I have a panel that has pictures that are 8 inches unfinished. I wanted something simple for some corners. Thought sq in sq might be simple. Any other ideas? They are a panel of things from Cape Canaveral. Thanks
    sustraley is offline  
    Old 08-10-2013, 04:21 AM
      #6  
    Super Member
     
    GingerK's Avatar
     
    Join Date: Jul 2010
    Location: Ontario, Canada
    Posts: 3,584
    Default

    If you have 2 co-ordinating colours, you could do churn dash. Or you could use one colour (even just black or white) and just make 2 inch sashing between each picture.
    GingerK is offline  
    Old 08-10-2013, 06:34 AM
      #7  
    Junior Member
     
    Join Date: Mar 2013
    Location: Hocking Hills, Ohio
    Posts: 211
    Default

    If you want a "true" square in a square block (like the first pic), the finished size needs to be 15". If you want to make it with HST (like the second pic) the HST and the corner squares are 3 3/4" finished.
    [ATTACH=CONFIG]429436[/ATTACH] [ATTACH=CONFIG]429437[/ATTACH]
    Attached Thumbnails square-square-22.jpg   square-square-33.jpg  
    cherisews is offline  
    Old 08-10-2013, 06:41 AM
      #8  
    Junior Member
     
    Join Date: Mar 2013
    Location: Hocking Hills, Ohio
    Posts: 211
    Default

    If you want to stay at 12" finished, you could try one of these:

    [ATTACH=CONFIG]429438[/ATTACH] [ATTACH=CONFIG]429439[/ATTACH] [ATTACH=CONFIG]429440[/ATTACH]

    The center square is 7 1/2" finished (so you can use your 8" pieces). In the first one the corner squares are 2 1/4" and the 3 center pieces are 2 1/4" X 2 1/2" finished. In the second & third ones, the corner squares are 2 1/4" and the elongated flying geese are 7 1/2" X 2 1/4" finished.

    Hope these help! Good luck and show us pics!!
    Attached Thumbnails square-square-variation-11.jpg   square-square-variation-33.jpg   square-square-variation-22.jpg  
    cherisews is offline  
    Old 08-10-2013, 09:02 AM
      #9  
    Junior Member
     
    Join Date: Feb 2012
    Location: Western Catskills
    Posts: 138
    Default

    Above ideas sound great for your purpose. If you want to continue with your original idea, but with the 'floating' center square as I described above, here's how: Given your 8" squares for the center, cut 7 5/8" squares (2 for each center), divide on the diagonal, and apply to your original squares. For me the easiest way to center the triangles on the squares was to iron all pieces in half and use the fold line. My test square ended up just 12.5 ". Hope this helps; in any case thanks for the challenge to my aging brain! --nanibi
    nanibi is offline  
    Old 08-10-2013, 02:16 PM
      #10  
    Super Member
    Thread Starter
     
    sustraley's Avatar
     
    Join Date: Nov 2010
    Location: Illinois
    Posts: 2,210
    Default

    Oh thank you very much. I am going to do a couple "test" blocks and see which one works best. DUH!!! I didn't even think of a churn dash. But, I still call myself a newbie. LOL
    sustraley is offline  
    Related Topics
    Thread
    Thread Starter
    Forum
    Replies
    Last Post
    jetnica
    Main
    5
    03-31-2010 05:54 PM
    reneebobby
    Links and Resources
    4
    04-07-2009 08:39 AM
    quiltwoman
    Pictures
    29
    12-29-2008 12:43 PM
    mgshaw
    Pictures
    16
    05-22-2008 11:56 PM

    Posting Rules
    You may not post new threads
    You may not post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is On
    Trackbacks are Off
    Pingbacks are Off
    Refbacks are Off



    FREE Quilting Newsletter