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  1. covfefe's Avatar
    Or is Microsoft dumb as rocks as usual...

    "In 1786, the German scientist Georg Christoph Lichtenberg described the advantages of basing a paper size on an aspect ratio of √2 in a letter to Johann Beckmann. The formats that became ISO paper sizes A2, A3, B3, B4, and B5 were developed in France."

    "This ratio has the unique property that when cut or folded in half widthwise, the halves also have the same aspect ratio."

    https://en.wikipedia.org/wiki/ISO_216
    Last edited by covfefe; 09-07-2017 at 02:42 AM. Reason: Corrected the ratio
    v_emman and aximtreo like this.
    09-06-2017 11:26 PM
  2. CraigCole's Avatar
    What? That's effing brilliant!
    09-15-2017 11:17 AM
  3. MSFTMatt's Avatar
    Ooooh I never stopped to research the ratio of paper, but I had always noticed folding paper width wise did put two smaller pieces of the same proportion. I would expect there to me some resemblance when viewing the promo videos about the next thing in mobile. I think it would be cool to have a 7-8" screen when expanded and 4-5 when folded... I'll have to get out some paper and do some math. Sadly since my calculus and advanced micro and macro economics and statistics courses I never got to continue using my brain in my jobs and the ability to do decent math in my head is lost until I get to practice it again
    09-20-2017 09:56 AM
  4. Jason Angle's Avatar
    Covefe, first great handle, second, what in the world was going on when you decided to research this in-regards to a Surface Phone?
    09-24-2017 11:45 PM
  5. midnightfrolic's Avatar
    how about a trifold 21:9. great for cinema videos. or 32:9.
    09-25-2017 12:58 AM
  6. Joe920's Avatar
    Or is Microsoft dumb as rocks as usual...

    "In 1786, the German scientist Georg Christoph Lichtenberg described the advantages of basing a paper size on an aspect ratio of √2 in a letter to Johann Beckmann. The formats that became ISO paper sizes A2, A3, B3, B4, and B5 were developed in France."

    "This ratio has the unique property that when cut or folded in half widthwise, the halves also have the same aspect ratio."

    https://en.wikipedia.org/wiki/ISO_216
    I was thinking 3:2 for unfolded (same as Surface line) and 1.5:2 = 3:4 when folded, same as iPad mini.
    09-26-2017 05:30 AM
  7. aximtreo's Avatar
    Mythically speaking: Yes
    Laura Knotek likes this.
    09-26-2017 07:29 AM
  8. covfefe's Avatar
    Ok so for a 6 inch primary screen, not taking into account the area required for the fold:
    wa1.png
    wa2.png
    wa3.png
    If it's a two screen folded device, keeping the same aspect ratio folded/unfolded, will be ratio of 1.4142, diagonal 8.48 inch unfolded, nice convenient "mini" type tablet size.

    wa4.png
    wa5.png
    wa6.png
    For a three screen device, keeping the same aspect ratio folded/unfolded, will be ratio of 1.7320, diagonal 10.39 inch which is a pretty convenient tablet size.
    09-28-2017 01:20 AM

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