- cross-posted to:
- lemmyshitpost@lemmy.world
- cross-posted to:
- lemmyshitpost@lemmy.world
cross-posted from: https://lemm.ee/post/29980757
Let π = 5
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There are people that think this post is wrong because the equation is wrong or due to a lack of units
The equation for cylindrical volume is correct (circular area multipled by height).
And the units are unimportant (can be described as cubed units)
The issue is that Pi is a constant. Constants and variables are different things.
Other examples of constants: 1, 24, 7, -1 … Etc.
Saying Pi = 5 is like saying 1 = 5 … Both Pi and numbers like 1,2,3, etc. have a constant (non-varying) value.
You can’t reassign a value on a constant. It’s like me sticking up 3 fingers and claiming there are 5 fingers there.
i had to solve a couple of problems with stuff like “assuming pi = 3”,… usually to make solving stuff without calculator easier
minor nitpick but the value of π is technically a parameter of the space you are operating in . which means it can have any arbitrary value as long as you are willing to operate in non euclidean spaces (and the space we live in is not euclidean though not to a measurable extent unless you are near a black hole)
but yeah in this context saying π is a constant is as correct as saying you cant take a square root out of a negative number .
edit : possibly better example is that a triangle’s angles sum to 180°
Ok, Picard. There clearly are 3.
I smell a quantum mechanics professor there.
Astronomers would round pi to 1.
Or 10, whatever. The precise value is only relevant when measuring the curve of space, and they’ll still disagree with mathematicians on most of the digits.
Ancient Greek Mathematicians would be so disappointed. Even they knew that pi is between 3.1 and 3.2.
POV your state just mandated by law that engineers round pi to the nearest integer (this has happened a few times, but it never sticks)
It has happened??
All the time, though usually never goes as far as actually passing. It’s rare that it does make it to law, but it does happen.
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They’re rounding down
You should cross in red the whole question and write
come see me after class !
Well, with those numbers, it’s easy math. :)
V=5*10^2*10
5,000. 5,000 what though?
Even with a proper π value, it still doesn’t make sense… 3,141.59265359
What? Its just the volume, without units. What part of it doesn’t make sense?
Well, a r=10 and h=10 doesn’t mean much without units. 10 what? Feet? Meters? Inches? CM?
Let’s take the OG numbers and assume feet, so 5,000 cubic feet. That’s not a useful volume measurement.
1 cubic foot of water = 7.48052 gallons
So 5,000 cubic feet of water = 37,402.6 gallons. That’s a viable volume measurement.
1 cubic meter = 1,000 liters.
5,000 cubic meters = 5,000,000 liters.
Well, a r=10 and h=10 doesn’t mean much without units. 10 what? Feet? Meters? Inches? CM?
Its not supposed to mean anything, it’s about the equation not about the end result. We’re not calculating an actual cilinder
If we’re not calculating something useful, then why are we here and not in the library learing about the universe?
Better question: What curvature of space is necessary for the apparent value of π to be 5?
If we’re not calculating something useful, then why are we here and not in the library learing about the universe?
We’re learning maths, which is arguably the foundation of the universe.
Better question: What curvature of space is necessary for the apparent value of π to be 5?
I’m afraid that that is beyond the comprehension of my human existence
Better question: What curvature of space is necessary for the apparent value of π to be 5?
~~honestly I don’t know if there is any way to measure curvature of space , but its slightly more curved than the surface of a ball (where π=4.712)~
edit : its more complex than that and topology of non euclidean spaces hurts
Kind of curious how you got that value. I think the ratio of circumference to diameter (“pi”) is actually smaller in spherical geometry, in the most extreme case (the equator) it’s just 1. You could say “pi = 5” for circles of a specific radius in hyperbolic geometry, I guess.
my mistake was using the sum of angles in a triangle which was kinda dum but whatever . I also tried calculating via the circumstance of a circle placed at a pole where π was 20x smaller for the case I was using but its not linear so I looked deeper which was a big mistake .
BTW the ratio of circumstance to radius for a circle which is also an equator of the space is ¼ not 1 (r=½π₀ , C=2π₀) .
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The unit is unit.
The math doesn’t care, and what you’re on about only really matters if the units don’t start as all the same or if you start converting between things.
Five thousand cubic units
Literally the correct answer. Must be a bunch of engineers in this thread.
No, engineers wouldn’t have a problem with this. This dude is just some rando that has no idea what he’s whinging about
Just calculating a cylinder that may or may not have an m&m minis tube stuck on it
As a dyscalculic, I can’t solve this but I don’t see a problem here… I see all you people freaking out that the little symbol thing equals five but it’s a little symbol thing haha it doesn’t have to be pie haha it could be a little symbol thing.
