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[–] 161 points 1 year ago (11 children)

Straight lines. Also two sets of parallel lines. This is one definition of a square, but not the common one.

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  • [–] 53 points 1 year ago* (3 children)

    I believe these lines are straight with a black hole at the centre.

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    [–] 122 points 1 year ago* (1 child)

    Someone never had to deal with mathematical proofs, only layman's definitions.

    All properties of a parallelogram apply:

    • Opposite sides are parallel
    • Opposite sides are congruent
    • Opposite angles are congruent
    • Consecutive angles are supplementary
    • Diagonals bisect each other

    AND

    • All angles are congruent
    • All sides are congruent
    • Diagonals are congruent
    • Diagonals are perpendicular
    • Diagonals bisect opposite angles
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  • [–] 85 points 1 year ago (1 child)

    The interior angles need to be equal 🤓

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    [–] 52 points 1 year ago (32 children)

    Does no one understand this is a joke, talking about parallel lines and mathematical proofs is pointless when its a fucking meme

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  • [–] 47 points 1 year ago (22 children)

    Oh let's get pedantic!

    The curved edges technically have infinite "side".

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  • [–] 7 points 1 year ago (5 children)

    Hey, that's my job!

    Also I don't think that's technically the technical classification. I think that sidedness is an attribute that simply doesnt apply to curves.
    You can approximate curves with some number of sides, and the approximation gets more accurate as the number approaches infinity, but it doesn't actually have the infinite sides.

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  • [–] 39 points 1 year ago (6 children)

    A square must also have two pairs of parallel sides.

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    [+] 33 points 1 year ago* (last edited 1 year ago)
    [–] 33 points 1 year ago (2 children)

    If it clucks likes a chicken and scratches like a chicken, it's Man.

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  • [–] 13 points 1 year ago (1 child)

    I got that reference!Behold, a featherless biped!

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  • [–] 10 points 1 year ago

    And for those who don't: Plato, a Greek philosopher, was putatively asked by a student while teaching at the Academy what the definition of a man (human) was. Plato responded that a man is a "featherless biped".

    Diogenes, another Greek philosopher and infamous quick-wit, caught wind of this and thought that was the dumbest thing ever, so he gate-crashed one of Plato's lectures and pulled out a chicken which had all of its feathers plucked out and said "Behold, a man!".

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  • [–] 31 points 1 year ago (8 children)

    I get downvoted for bringing it up, but for fuck's sake you're dumping literally everything into this community regardless of the fit. There are a dozen (I'm estimating) other communities that could benefit from the content you post but you have thus far insisted on only posting here.

    Can you at least make the tiniest effort to spread content to other communities that would benefit from the increased views and potential subscriptions?

    I shall await the fun police and everything's a meme comments.

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    [–] 21 points 1 year ago (6 children)

    Rotate the cone towards you.

    Now you see this. 🤯

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    [–] 21 points 1 year ago*
    [–] 19 points 1 year ago (2 children)

    Learned this one in 6th grade geometry: drawing a square in thr corner doesn't make it 90°

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    [–] 19 points 1 year ago

    I'm not a math major, but I always considered it that a square is a special case of rectangle, a rectangle is a special case of parallelogram, and a parallelogram a special case of a quadrilateral, a quadrilateral a special case of a simple polygon.

    This shape isn't a polygon, so it cannot be a square.

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  • [+] 16 points 1 year ago* (last edited 1 year ago) (8 children)
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    [–] 15 points 1 year ago

    Dammit Diogenes, this is why we don't allow you in the geometry class anymore.

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  • [–] 15 points 1 year ago (7 children)

    Solution:

    Explanation:

    1. in order for the straight lines to be 90 deg with the circles, they must be radii of circles with same central point

    2. the length of an arc is defined as c = r * θ (where r is the radius, and θ is the angle)

    3. we define the inner circle with radius r₁ and its arc L₁ = r₁ * θ₁

    4. we define the outer circle with radius r₂ and its arc L₂ = r₂ * θ₂

    5. Because of (1), θ₁ + θ₂ = 2π

    6. To create the shape, L₁ = L₂ = r₂ - r₁

    If you start replacing and solving, you will get a 2nd grade quadratic, which has a positive and a negative solution. The positive solution is that magic number.

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    [–] 9 points 1 year ago

    Thanks, I hate it.

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  • [–] 9 points 1 year ago

    Diogenes go home.

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  • [–] 9 points 1 year ago

    Tut tut, all these maths books promoting unhealthy square shapes, real squares have curves.

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  • [–] 8 points 1 year ago

    Not a polygon

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  • [–] 7 points 1 year ago
    [–] 6 points 1 year ago (1 child)
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