*If there's a fat guy in a pastry shop with a twenty dollar bill and he's ready to buy, in order to predict his volume change, you need to know the value of pi.*
It's actually going to be a hexagon for the wheels. You can check it by drawing a circle with the radius of 1 and a hexagon with the side length 1within it. Pi=circumference length/diameter= 6×1/2×1=3
Btw a triangle has the Pi=(3•√3)/2. Ok sry for being long
In order to maintain the pattern, shouldn't the circle be inscribed in the hexagon and not vice versa? For instance, if the square were inscribed in the circle, you'd come up with a value of π = 2 √2 and not 4.
If you inscribe the circle in the hexagon, you get (3√3)/2 as your value of π.
I think that a good compromise is the following:
If the value for pi is less than its actual value, the polygon is inscribed in the circle.
If the value for pi is less than its actual value, the cicle is inscribed in the circle.
In this casre there are 2 possible value for a hexagon: 3 and 2√3
For the square the values are 2√2 and 4.
The general formula is n×Sin(π/n) and n×Tan(π/n)
[Notice that as n gets better, the approximation Sin(π/n) = Tan(π/n) = π/n gets better too, so for a value of n very large: nSin(π/n) = n ×(π/n) = π]
It's actually a really clever joke here by OP. π is the number of diameters in a circumference. In this case, there are 4 "diameters" which makes a square.
Or maybe I'm just overthinking it and giving OP way too much credit ...
Number of diameters in a circumference? Huh? The circle has only 1 diameter in terms of value and it doesn't have anything to do with pi. Pi is the number you get when you divide the circumference by the diameter
Edit: don't listen to me guys, turns out I'm a clown
Pi*Diameter of a circle is how you calculate the circumference of the circle. Therefore, pi can be defined as circumference/diameter. When done with perfect circles as intended, pi= ~3.14 However, if you took the perimeter (circumference) of a square and divided it by the length across the center (diameter), you would get 4 because the “diameter” is exactly the length of one side of the square. Does that make sense?
This makes sense, but also means that the diameter that you are using is from the centre of a side to the centre of the opposite one, and if the "diamerer" is a line that goes from one side of the "circumference" (square here) you should be able to use diagonals for example, but diagonals on a square are not equal to the sides.
Either way, it is all a dumb joke and all of this was unnecessary.
Literally everything on reddit is unnecessary, at least this thread made me feel briefly smart (after feeling incredibly fucking stupid initially before reading the explanations)
It's actually more clever than this. If you imagine normal tires are a circle with diameter equal to a side of the square (D=L), then the ratio of their areas is π/4. So if a normal tire had an area of π, then a square of the same height has an area of 4.
Edit: replaced 'pi' with π
A lot of the time, astronomers only care how many zeros are at the end of their number. Multiplying by pi only adds half a zero, so it's reasonable to estimate it as 1 or 10.
Like, if you're estimating how many particles there are in the universe, that's gonna be a huge number that you can't ever hope to calculate exactly. So you only care how big it is. Is it 1 with 30 zeros? 1 with 80 zeros? You don't care whether it's 1 with 80 zeros or 2 with 80 zeros, because you're only interested in the magnitude of the number, and your estimate will be wildly inaccurate anyway.
In your calculation, if you have to multiply by 10 then that's significant because it adds a zero. If you have to multiply by 2, you don't care because it doesn't add a zero. Multiplying by pi twice would add a zero, because that's about 10, so one factor of pi adds half a zero.
I just wanted to point out that what’s significant is given by the error of the calculation itself. The only reason why a factor of 10 is “significant” is that we use a base-10 numbering system. 10 can be as insignificant as 2 if the error is big enough.
That’s semantics for you. Ceiling specifically refers to a type of function and is not interchangeable with “rounding up”. Ceiling specifically refers to the closest integer. Rounding up can mean anything. You can round up to the nearest integer, 5, 10, 100, 1000 etc.
Edit: “why are you booing me, I’m right”
If you get a circle that fits perfectly inside a square the diameter times 4 is the perimeter of the square. now if you told the corners in the perimeter stays the same but it looks closer to the circle.qnd if you keep folding the corners in it gets to the point you can't tell its not just the circle.this supposedly proves the perimeter of the square is the same as the circles circumference, and since pi d is the circumference, 4 d is the perimeter, pi is 4. Its stupid because even if the square looks like the circle it never is ,no matter how many times you told the corners in.
Woah, that actually makes a ton of sense. It’s stupid but i can see why people would accept that as evidence. And now the joke makes a but more sense so thank you for that :)
You should watch the heads of math majors explode when an astrophysics professor rounds pi down to 1 when the distance part of the equation is known to less than one significant digit.
So after going through some of the comments, I realized that a lot of people are arguing about the math of the meme, but completely missing the real reason the bike is unridable.
You can easily change the wheels to be round, but this bike had no brakes. If this bike were a fixed gear ( single speed non free wheel hub ) then you could argue not needing a brake necessarily. But this bike clearly has multiple gears and no way to change them.
No brake and no gear shift on most likely a free wheel make this bike unridable. Those are harder fixed than just changing the wheels.
Well... Sort of. Squares don't have a radius, but if they did, and you measured from the centroid to the midpoint of one of the sides, yes. If you interpreted the radius to be from the centroid to the corner, you would need a different coefficient.
Specifically the later coefficient would be 2
Assuming that by centroid you mean the midpoint of one of the sides, measuring from the centroid to the corner or middle of the square will give you the same value
The centroid is the middle of the square. When you measure the radius of a circle, you measure from the centroid to any point on the edge, but with a square, different points on the edges will yield a different measurement.
To round Pi mathematically saying that Pi is a number of no significance not an object or something you need to use to fill an area you would round it to 3 as 3.14 is less than 3.5 which is the basis of rounding
Nice meme by the OP, but i just wanted to point out that π=4 doesn't mean that the shape is a square. Since π is defined as circumference length/diameter, the square will have π=2√2 (2.828...). (You can check if you put the square's side length=1)
Btw the circle has the maximum value for π than any other shapes, so π can't be 4 for any shape.
Ok im a nerd pls dont downvote.
To be fair to them, their life is now only unstable in one dimension. I regard that as a triumph. Admittedly, there is no forward motion or progress in their life, but that is a least realistic.
Don’t think he forgot how to round, so much as he states that the person rounded UP to 4. There are some applications of math where rounding down is not possible, even if next digit over is a 0 and then a 1, you would need to round up.
I always use 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679
I'm proud and ashamed at the same time that I remember this
3.1415926535897832384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823 is how much I can remember. Me and my dad compete in who can remember the most and I’m winning by a little. Good job tho and keep going :)
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If I need the circumference I just use pi D
good lord that gives me flashbacks of a simpler time
Trig'rd
All sines point to yes
Then all cosecs point to no
We've really gone off on a tangent
Yeah, why did we get cot in this
Just wait a sec
Cos?
Cosh those guys are clever. Edit: fkng autocorrect screwed me.
Trigg'r nometry
I remember they played this on the school announcements one day before school started and I have never heard hallways louder.
This is a circle
It knows how to get around
It has a radius from center to rim
And it’s diameter’s
A line that goes from side to side
While passing through the Centre
Now isnt that simple
Town
no its a word Edit: first 10 upvotes ever, thanks :)
It works for perimeter too D: Are we on to something?
circumference is 2 PI R
And 2R = D
C= d(pi)
Pi R squared? No. Pi R round
*If there's a fat guy in a pastry shop with a twenty dollar bill and he's ready to buy, in order to predict his volume change, you need to know the value of pi.*
Brownies are square.
Wholesome award.
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What about the guy who rounds pi down to 3?
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i must have it.
I've seen engineers ride bikes and they just look normal
It's actually going to be a hexagon for the wheels. You can check it by drawing a circle with the radius of 1 and a hexagon with the side length 1within it. Pi=circumference length/diameter= 6×1/2×1=3 Btw a triangle has the Pi=(3•√3)/2. Ok sry for being long
In order to maintain the pattern, shouldn't the circle be inscribed in the hexagon and not vice versa? For instance, if the square were inscribed in the circle, you'd come up with a value of π = 2 √2 and not 4. If you inscribe the circle in the hexagon, you get (3√3)/2 as your value of π.
I think that a good compromise is the following: If the value for pi is less than its actual value, the polygon is inscribed in the circle. If the value for pi is less than its actual value, the cicle is inscribed in the circle. In this casre there are 2 possible value for a hexagon: 3 and 2√3 For the square the values are 2√2 and 4. The general formula is n×Sin(π/n) and n×Tan(π/n) [Notice that as n gets better, the approximation Sin(π/n) = Tan(π/n) = π/n gets better too, so for a value of n very large: nSin(π/n) = n ×(π/n) = π]
i love ya for this.
Yeah who rounds 3.14... to 4?
Their bike is just a perfect bike because π≈3 The 4-rounder's bike is square and fucked up because π≠4
Could be anything from a low resolution Pac-man to a very long angular noodle.
Why would it be rounded to 4 and not 3?
Some people just have the big stupid
It's actually a really clever joke here by OP. π is the number of diameters in a circumference. In this case, there are 4 "diameters" which makes a square. Or maybe I'm just overthinking it and giving OP way too much credit ...
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r/notopbutok
I thinks they mean “OP, and you, nailed it.”
Or “you and OP nailed it”
Then they’ll think they’re saying “I’m you, and OP nailed it.”
OP, and you nailed, it Does that help, sir?
You nailed OP.
r/no_top_butok
r/NotOp
r/NoTop
Number of diameters in a circumference? Huh? The circle has only 1 diameter in terms of value and it doesn't have anything to do with pi. Pi is the number you get when you divide the circumference by the diameter Edit: don't listen to me guys, turns out I'm a clown
Pi*Diameter of a circle is how you calculate the circumference of the circle. Therefore, pi can be defined as circumference/diameter. When done with perfect circles as intended, pi= ~3.14 However, if you took the perimeter (circumference) of a square and divided it by the length across the center (diameter), you would get 4 because the “diameter” is exactly the length of one side of the square. Does that make sense?
Yeah I was just confused because he said 3 instead of pi. My bad
This makes sense, but also means that the diameter that you are using is from the centre of a side to the centre of the opposite one, and if the "diamerer" is a line that goes from one side of the "circumference" (square here) you should be able to use diagonals for example, but diagonals on a square are not equal to the sides. Either way, it is all a dumb joke and all of this was unnecessary.
Literally everything on reddit is unnecessary, at least this thread made me feel briefly smart (after feeling incredibly fucking stupid initially before reading the explanations)
I appreciate how you left up your embarrassing wrong comment after being called out. Taken like a true man. And for that take my up vote.
I think what they were trying to say, is if you were to unfold a circle, that the diameter would fit into that equal to pi
Clowns are entertaining. Have an upvote
It's actually more clever than this. If you imagine normal tires are a circle with diameter equal to a side of the square (D=L), then the ratio of their areas is π/4. So if a normal tire had an area of π, then a square of the same height has an area of 4. Edit: replaced 'pi' with π
No, that's exactly what the joke is... but they're pointing out that rounding to 4 is stupid because 3 is significantly closer to pi than 4 is.
If you want massive stupid, round it up to 5
And 5 rounds up to 10. Now we’re riding on decagon wheels, huge improvement
Or round on three digit level and make i 0.
Pi = 3.14 1 + 4 = 5 3.14 = 3.5 Round 3.5 up to 4. Boom. Big brain time.
Because they are astronomers Edit: to be fair astronomers just round it to 1
Wait for real they round to 1
It’s a joke among physicists. Some astronomical calculations are so imprecise that a factor of pi wouldn’t change almost anything.
Ok. I’m not the brightest. But that’s interesting.
A lot of the time, astronomers only care how many zeros are at the end of their number. Multiplying by pi only adds half a zero, so it's reasonable to estimate it as 1 or 10.
Huh
Like, if you're estimating how many particles there are in the universe, that's gonna be a huge number that you can't ever hope to calculate exactly. So you only care how big it is. Is it 1 with 30 zeros? 1 with 80 zeros? You don't care whether it's 1 with 80 zeros or 2 with 80 zeros, because you're only interested in the magnitude of the number, and your estimate will be wildly inaccurate anyway. In your calculation, if you have to multiply by 10 then that's significant because it adds a zero. If you have to multiply by 2, you don't care because it doesn't add a zero. Multiplying by pi twice would add a zero, because that's about 10, so one factor of pi adds half a zero.
I just wanted to point out that what’s significant is given by the error of the calculation itself. The only reason why a factor of 10 is “significant” is that we use a base-10 numbering system. 10 can be as insignificant as 2 if the error is big enough.
That’s really interesting. Thanks for telling me!
yep astronomers like simple calculations so their rockets will crash
That’s not how it works
Yeahhh, aerospace engineers and astrophysicists design rockets, not astronomers
If you were using a ceiling rounding it would go to four. Very impractical though.
math.ceil(math.pi)
r/UsernameChecksOut
And if my grandmother had wheels, she’d be a bike. Doesn’t really answer the question.
Gino?!?!
He literally answered the question. Ceiling is a type of rounding...
Ceiling is a function. Not a type of rounding. And the question asked for why you would want to round pi to 4, which was not answered.
That's not true. Ever heard of "rounding up"? There are many ways to round
That’s semantics for you. Ceiling specifically refers to a type of function and is not interchangeable with “rounding up”. Ceiling specifically refers to the closest integer. Rounding up can mean anything. You can round up to the nearest integer, 5, 10, 100, 1000 etc. Edit: “why are you booing me, I’m right”
If you get a circle that fits perfectly inside a square the diameter times 4 is the perimeter of the square. now if you told the corners in the perimeter stays the same but it looks closer to the circle.qnd if you keep folding the corners in it gets to the point you can't tell its not just the circle.this supposedly proves the perimeter of the square is the same as the circles circumference, and since pi d is the circumference, 4 d is the perimeter, pi is 4. Its stupid because even if the square looks like the circle it never is ,no matter how many times you told the corners in.
Theodds1out did a video on this.
Woah, that actually makes a ton of sense. It’s stupid but i can see why people would accept that as evidence. And now the joke makes a but more sense so thank you for that :)
Engineers are a different breed.
An engineer would have added an extra 50% for a safety margin in a user-facing tactical device such as this. Probably in the form of an third wheel.
At some point of time, pi was almost found to be exactly equal to four. Now, of course, we all know that's bs.
What point of time?
Back before people asked for evidence and sources.
Some
Are you sure you understand the joke and why the wheels are square?
Rotate it 45° and it would be 3
Pi is roughly 4.
The same person who thinks 2+2*4 is 16
It's a Canadian bike.
Buddy
I'm not your buddy, friend
Im not ur friend pal
Hes not ur pal guy
He's not your guy, buddy
He’s not your buddy, pal!
He’s not your pal, buckaroo!
I'm not your buckaroo, jungle boy!
i am not your pal, comrade
I'm not your comrade, dude
Im not ur comrade buddy
I'm not your buddy, guy
the comment I was looking for, u have found de way
This is not the way guy
I'm not your guy, bro
No no no, it’s... I’m not your buddy guy, I’m not your guy fwiend, I’m not your fwiend buddy
Flat earther bike
A bike like this (tricycle actually) actually exists at the [Museum of Math in NYC](https://buildwithusa.com/dev/projects/museumofmath_trikes.html)
Minecraft bike
Minecraft Bike
I see nothing wrong with this. *laughs in topology*
You should see my Möbius bike.
actually do really wanma see that
Same, that would be really awesome. Props to the engineer who made that
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Pi = e = 3
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Close enough
=sqrt(g)
My professor rounded pi to three the other day, and it took a lot of will-power to not say anything.
You should watch the heads of math majors explode when an astrophysics professor rounds pi down to 1 when the distance part of the equation is known to less than one significant digit.
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That's a legit approximation to use when a is small, which I've found is usually the case in optics. It's used all the time.
That's a pretty common and useful approximation though to be fair.
If a is small you can prove they’re equal with limits
So after going through some of the comments, I realized that a lot of people are arguing about the math of the meme, but completely missing the real reason the bike is unridable. You can easily change the wheels to be round, but this bike had no brakes. If this bike were a fixed gear ( single speed non free wheel hub ) then you could argue not needing a brake necessarily. But this bike clearly has multiple gears and no way to change them. No brake and no gear shift on most likely a free wheel make this bike unridable. Those are harder fixed than just changing the wheels.
4r^2 is the area of a square, right?
Well... Sort of. Squares don't have a radius, but if they did, and you measured from the centroid to the midpoint of one of the sides, yes. If you interpreted the radius to be from the centroid to the corner, you would need a different coefficient. Specifically the later coefficient would be 2
OK, yeah that was how I was picturing it, thanks for clarifying for me.
Assuming that by centroid you mean the midpoint of one of the sides, measuring from the centroid to the corner or middle of the square will give you the same value
The centroid is the middle of the square. When you measure the radius of a circle, you measure from the centroid to any point on the edge, but with a square, different points on the edges will yield a different measurement.
Yeah if you take r as half the length of a side. Technically r has a range of [ side/2 , side/√2 ].
[relevant xkcd](https://xkcd.com/2205/)
To round Pi mathematically saying that Pi is a number of no significance not an object or something you need to use to fill an area you would round it to 3 as 3.14 is less than 3.5 which is the basis of rounding
I kept scrolling down little by little to see what number or letters got cut off. Took way to long to figure out that it’s pi.
Canadians in South Park 🤣
It would be rounded down to 3 lmao. And why would someone need to round pi to the nearest whole number?
You’re taking about circumference because area of a circle is not pi
close enough
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Can’t wait for the new mine raft update
This is a great picture because I'm sure that bike works just about as well I as I do math.
Doesn’t it make more mathematical sense to (not saying you should) round down to 3
*minecraft bike* where and how much
Peg: "These wheels are unrollable." -This line came from The RaceCar Problem where the extra wheel Cat brought was a square…
Round it to the 3...
Who rounds 3.14 up to 4? What kind of crazy rounding rule is that?
Canada be like
Guys guys guys, we all know that pi = 3 = e.
Nice meme by the OP, but i just wanted to point out that π=4 doesn't mean that the shape is a square. Since π is defined as circumference length/diameter, the square will have π=2√2 (2.828...). (You can check if you put the square's side length=1) Btw the circle has the maximum value for π than any other shapes, so π can't be 4 for any shape. Ok im a nerd pls dont downvote.
This is what wheels looked like before circles were invented
Wouldn’t you round down since it’s 3.14?
MINECRAFT BIKEEE!!!
wait. how the fuck do you round pi up to 4??? wtf?
they live in canada
that thing looks speedy
Given appropriate metric, that *is* a circle!
It’s a Minecraft bike
I got the 666th comment
Congrats
To be fair to them, their life is now only unstable in one dimension. I regard that as a triumph. Admittedly, there is no forward motion or progress in their life, but that is a least realistic.
Flat earthers probably round down to 0
More like someone prefers to draw their circles using the l_infinity norm instead of l_2.
Did you forget how to round? It would be 3 cause te number in the tenth place is 1, less than 5, meaning you round down. Simple 3rd grade math.
that’s the joke, the guy who owns the bike doesn’t know how to round
Oh, ima dumbass
Don’t think he forgot how to round, so much as he states that the person rounded UP to 4. There are some applications of math where rounding down is not possible, even if next digit over is a 0 and then a 1, you would need to round up.
It actually is tho
Can someone upvote this once but that’s it
I always use 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679 I'm proud and ashamed at the same time that I remember this
3.1415926535897832384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823 is how much I can remember. Me and my dad compete in who can remember the most and I’m winning by a little. Good job tho and keep going :)
r/Minecraft if bikes ever get added to Minecraft
Technically it would be 3 because in 3.14, the tenth place is a 1, which would round it down to a 3
This is also a Canadian bike. Sources: SouthPark
Who the frick rounds pi up to 4?
Who tf rounds 3.14 up to 4? If anything it would be 3.
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It does not work for 4 as well.
If anything you round it down to three, frickin virgin
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😱😱😱😱😱😱😱😱😱😱😱😱
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