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  1. Prikvačeni tweet
    31. pro 2019.
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  2. proslijedio/la je Tweet
    prije 46 minuta

    A year ago today someone kind wrote this article about one of my books with , Geometry Snacks... It took a while to find out what it actually said! It's still holding strong as a number 1 bestseller in the cut throat category of 'Geometry for Young Adults' 😜

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  3. proslijedio/la je Tweet
    3. velj

    I told my kid (who’d asked about absolute value signs) “They’re just like parentheses so there’s never any ambiguity,” but then I realized that things are more complicated; for instance |-1|-2|-3| could be 5 or -5. Has anyone encountered ambiguities like this in the wild?

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  4. proslijedio/la je Tweet
    prije 1 sat
    Odgovor korisniku/ci

    I'm curious about the number of distinct values of |-1|-2|-3|....|-(2n-1)|. The first 12 terms are 1, 2, 5, 13, 39, 124, 403, 1304, 4301, 14370, 47575, 157153, assuming my program is correct. It's not in the OEIS.

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  5. proslijedio/la je Tweet
    2. velj
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  6. proslijedio/la je Tweet
    2. velj

    and friends! Help me crowdsource some data for my statistics class this week using the activity! This will take about two minutes! Share this with others!

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  7. 2. velj
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  8. 2. velj
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  9. 2. velj
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  10. proslijedio/la je Tweet
    30. sij

    02/02/2020 is the only date in our lifetimes — and the 1st since 11/11/1111 — to be palindromic across the World, in whatever date format you choose.

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  11. proslijedio/la je Tweet
    1. velj

    Exploring a half with the 5 year old today

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  12. proslijedio/la je Tweet
    29. sij
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  13. 25. sij

    Nice ! Assuming the cheese is elliptic, how would you calculate/construct this ?

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  14. proslijedio/la je Tweet
    22. sij

    Ca y est, on lance notre site pour la semaine maths & numérique. Merci d'avance pour vos retours !

    , , i još njih 7
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  15. proslijedio/la je Tweet
    22. sij

    with low frequencies. A little update to this applet for plotting closed curves with epicycles. ⭕️↔️ 🐈 Enjoy! ♾ fun!

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  16. proslijedio/la je Tweet
    19. sij
    Odgovor korisnicima

    Using polyhedron nets to work out weaving patterns works well

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  17. proslijedio/la je Tweet
    7. sij

    Maths teachers/lovers: an amazing resource full of awesome puzzles. Just been planning some ace starters for year 9 top set.

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  18. 17. sij
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  19. proslijedio/la je Tweet
    11. sij
    Odgovor korisniku/ci

    A 3D proof without words for the sum of the first odd numbers : 1+3+5+...+(2n-1)=n²

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  20. proslijedio/la je Tweet
    8. sij

    Studying or teaching Complex Analysis? This online book might be useful. ⭐️Complex Analysis: A Visual and Interactive Introduction⭐️ 🔗 Thanks everyone for your suggestions and reporting issues to improve this project.

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  21. proslijedio/la je Tweet
    10. sij

    Pick a perimeter. What is the area of the typical isosceles triangle with that perimeter? Use the app to explore.

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