1184: "Circumference Formula"
Moderators: Moderators General, Prelates, Magistrates
1184: "Circumference Formula"
Alt: Assume r' refers to the radius of Earth Prime, and r'' means radius in inches.
The simple jokes are best. Always preferred the single panel silliness to the longer setup to punchlines.
Last edited by kelvinc on Mon Mar 11, 2013 4:22 am UTC, edited 2 times in total.
 rhomboidal
 Posts: 784
 Joined: Wed Jun 15, 2011 5:25 pm UTC
 Contact:
Re: 1184: "Circumference Formula"
r''' means batteries and clarity not included.
Re: 1184: "Circumference Formula"
This made me die a little inside
 orangustang
 Posts: 29
 Joined: Fri Dec 16, 2011 6:45 am UTC
 Location: Richmond, VA
 Contact:
Re: 1184: "Circumference Formula"
Of course, r''' is the second derivative of the radius of Earth Prime.
Re: 1184: "Circumference Formula"
All I could think of when I saw the tooltip was, "Why is r' for Earth Prime and r" for inches, instead of r' being in feet, and r" in seconds?"
In all fairness...
Re: 1184: "Circumference Formula"
My second thought lead me to check the Wikipedia Circle article, to see if someone was actually lame enough to footnote the formula.
In all fairness...
Re: 1184: "Circumference Formula"
Ryan's a few dozen years late with this. See "Mathmanship" by Nicholas Vanserg (1958):
(Vanserg was actually a psuedonym.)
The other side of the asterisk gambit is to use a superscript as a key to a real footnote. The knowledge‐seeker
reads that S is –36.7^{14} calories and thinks "Gee what a whale of a lot of calories" until he reads to the bottom of
the page, finds footnote 14 and says "oh."
(Vanserg was actually a psuedonym.)
Re: 1184: "Circumference Formula"
I'm not sure if this is exceedingly clever, or just nerdy. Or both. So conflicted.
Hi joee! (origin story)
Re: 1184: "Circumference Formula"
.........I stared at it for twenty seconds going no wait what that can't be right i don't get it
then I noticed the footnote _;
then I noticed the footnote _;
Re: 1184: "Circumference Formula"
Almost lost my mind there for a moment...
 RAGBRAIvet
 Posts: 119
 Joined: Tue Apr 05, 2011 12:50 pm UTC
 Location: 43° 53' 03" 91° 14' 06"
Re: 1184: "Circumference Formula"
You know, the same formula can be expressed as πD (where "D" is diameter of the circle). No footnote needed.
For that matter, since when did common formulae require footnotes to explain the accepted standard symbols for constants and variables?
For that matter, since when did common formulae require footnotes to explain the accepted standard symbols for constants and variables?
 alvinhochun
 Posts: 54
 Joined: Wed Nov 14, 2012 3:07 pm UTC
Re: 1184: "Circumference Formula"
Coyne wrote:My second thought lead me to check the Wikipedia Circle article, to see if someone was actually lame enough to footnote the formula.
Wait I still don't see any xkcd vandalism. Perhaps it is a bit difficult to add footnote to an equation?
Re: 1184: "Circumference Formula"
Lately I've been seeing a lot of news articles on the web saying inane things like "Astronomers now believe there may be as many as 31023 stars in the universe", where both the × symbol and the markup for the exponentiation have been lost in the cutting and pasting.
Re: 1184: "Circumference Formula"
"The circle's radius" is not plausible as a footnote.
"Or πd" could do, though.
"Or πd" could do, though.
Re: 1184: "Circumference Formula"
RAGBRAIvet wrote:You know, the same formula can be expressed as πD (where "D" is diameter of the circle). No footnote needed.
For that matter, since when did common formulae require footnotes to explain the accepted standard symbols for constants and variables?
Then it would just be πD^{3}.
^{3}The circle's diameter
Re: 1184: "Circumference Formula"
da Doctah wrote:Lately I've been seeing a lot of news articles on the web saying inane things like "Astronomers now believe there may be as many as 31023 stars in the universe", where both the × symbol and the markup for the exponentiation have been lost in the cutting and pasting.
Grr. My favourite newspaper insists on using Coulombs as a unit of temperature, e.g. "Temperatures in parts of the UK dropped to 5C last night".
xtifr wrote:... and orthogon merely sounds undecided.
Re: 1184: "Circumference Formula"
As a former student of mathematics, I would just like to say GGAAAAAAHHHHHH!!!!!
It's the maths equivalent of fingernails on a chalkboard, I can still feel it. GGAAAAAAHHHHHH!!!!!
It's the maths equivalent of fingernails on a chalkboard, I can still feel it. GGAAAAAAHHHHHH!!!!!
 Plasma_Wolf
 Posts: 112
 Joined: Mon Aug 22, 2011 8:11 pm UTC
Re: 1184: "Circumference Formula"
As a current student of mathematics, I would just like to say I love it. It's a simple joke, but a very good one.
Re: 1184: "Circumference Formula"
As someone who never was a student of mathematics (but had the great pleasure to have to attend a shitload of math courses, including my most beloved "vector analysis") and has no intent of ever becoming one, I must say that I found it a little amusing.
Re: 1184: "Circumference Formula"
"Earth prime"... is that the moon? (Seeing as prime/secundus/etc are usually used to indicate the nth body orbiting another body.)
ylno thgir ot tfel morf txet siht daer esaelp

 Posts: 43
 Joined: Wed Nov 24, 2010 2:40 pm UTC
Re: 1184: "Circumference Formula"
I get a smug feeling now I know that the area of my land is πr^{22}
Re: 1184: "Circumference Formula"
oliphaunt wrote:"Earth prime"... is that the moon? (Seeing as prime/secundus/etc are usually used to indicate the nth body orbiting another body.)
In shows and stories that use 'parallel universes' such as Sliders, the original earth we all know and love is often called 'Earth prime'. But I don't know if the comic is referring to that.
Also, this made my math hurt.
 RAGBRAIvet
 Posts: 119
 Joined: Tue Apr 05, 2011 12:50 pm UTC
 Location: 43° 53' 03" 91° 14' 06"
Re: 1184: "Circumference Formula"
Two pi r square? Nonsense!!
Two pi r round. CORNBREAD r square!
Two pi r round. CORNBREAD r square!
Re: 1184: "Circumference Formula"
da Doctah wrote:Lately I've been seeing a lot of news articles on the web saying inane things like "Astronomers now believe there may be as many as 31023 stars in the universe", where both the × symbol and the markup for the exponentiation have been lost in the cutting and pasting.
Write it as "Astronomers now believe there may be more than 31023 stars in the universe" and it's still correct, although admittedly a little bit uninformative
It's one of those irregular verbs, isn't it? I have an independent mind, you are an eccentric, he is round the twist
 Bernard Woolley in Yes, Prime Minister
 Bernard Woolley in Yes, Prime Minister
Re: 1184: "Circumference Formula"
In the age of the colour printer, why don't we have an agreed colour scheme for academic documents? We more or less managed it for html links. You could make references a particular colour, but you would have to design it to accomodate things like colour blindness and human eye sensitivity, especially with regards to reading.
Or you could just put them in a box or a ⓑⓤⓑⓑⓛⓔ.
(whistles innocently) ¸¸.•*¨*•♫♪
Or you could just put them in a box or a ⓑⓤⓑⓑⓛⓔ.
(whistles innocently) ¸¸.•*¨*•♫♪
 peewee_RotA
 Posts: 504
 Joined: Mon Dec 12, 2011 1:19 pm UTC
Re: 1184: "Circumference Formula"
What do you say to a baker who can’t find his circumference?
Tell him where his 2 pies are.
Tell him where his 2 pies are.
"Vowels have trouble getting married in Canada. They can’t pronounce their O’s."
http://timelesstherpg.wordpress.com/about/
http://timelesstherpg.wordpress.com/about/
Re: 1184: "Circumference Formula"
Should it not be
Circumference^{1} of a circle^{2}:
2^{3}π^{4}r^{5}
^{1} Length of the path that bounds a round shape shape
^{2} OED: a plane figure bounded by a single curved line which is everywhere equally distant from a point within
^{3} A number; one more than one.
^{4} A number slightly more than one more than one^{6} more than one. Appears as the ratio of different aspects of circles: See Circumference of a circle
^{5} The distance from the centre of a circle to the edge of the circle
^{6} See ^{3}
Circumference^{1} of a circle^{2}:
2^{3}π^{4}r^{5}
^{1} Length of the path that bounds a round shape shape
^{2} OED: a plane figure bounded by a single curved line which is everywhere equally distant from a point within
^{3} A number; one more than one.
^{4} A number slightly more than one more than one^{6} more than one. Appears as the ratio of different aspects of circles: See Circumference of a circle
^{5} The distance from the centre of a circle to the edge of the circle
^{6} See ^{3}
Re: 1184: "Circumference Formula"
RAGBRAIvet wrote:You know, the same formula can be expressed as πD (where "D" is diameter of the circle). No footnote needed.
For that matter, since when did common formulae require footnotes to explain the accepted standard symbols for constants and variables?
Nice to see that your humor bypass surgery was successful.

 Posts: 16
 Joined: Mon Mar 07, 2011 1:25 pm UTC
Re: 1184: "Circumference Formula"
Desperately needs a citation  Google only turns up this discussion for that one. Mind you I'd be more interested in the Astronomer who *didn't* believe there were as many as 31023 stars in the Universe.
da Doctah wrote:Lately I've been seeing a lot of news articles on the web saying inane things like "Astronomers now believe there may be as many as 31023 stars in the universe", where both the × symbol and the markup for the exponentiation have been lost in the cutting and pasting.
Re: 1184: "Circumference Formula"
Ouch, this hits close to home.
I've gotten used to notation being horribly butchered in the social sciences, to the point where reading things as intended is the hardest part of most problems.
I've gotten used to notation being horribly butchered in the social sciences, to the point where reading things as intended is the hardest part of most problems.
LEGO won't be ready for the average user until it comes preassembled, in a single unified theme, and glued together so it doesn't come apart.
Re: 1184: "Circumference Formula"
Reminds me of another joke.
Assume that radius of a pizza is z and depth of a pizza is a.
The volume of the pizza is pizza
Assume that radius of a pizza is z and depth of a pizza is a.
The volume of the pizza is pizza
Re: 1184: "Circumference Formula"
Antior wrote:oliphaunt wrote:"Earth prime"... is that the moon? (Seeing as prime/secundus/etc are usually used to indicate the nth body orbiting another body.)
In shows and stories that use 'parallel universes' such as Sliders, the original earth we all know and love is often called 'Earth prime'. But I don't know if the comic is referring to that.
Also, this made my math hurt.
In DC Comics, "Earth Prime" is, moreorless, the real world, where the comics are written and published. I say "moreorless" because DC characters have been known to visit Earth Prime with their powers intact, which argues that the laws of physics are not quite as rigid there as here...
Re: 1184: "Circumference Formula"
'Earth Prime' made me immediately think of Sliders. And for that I thank you.
Re: 1184: "Circumference Formula"
Sandman81 wrote:Reminds me of another joke.
Assume that radius of a pizza is z and depth of a pizza is a.
The volume of the pizza is pizza
May sound like a joke but this is how I taught my son to remember how to calculate the volume of a cylinder for his GCSEs
Re: 1184: "Circumference Formula"
I don't know which I hate more unreferenced footnotes or undereferenced^{2} footnotes.
Joe
[1] i.e. this one.
Joe
[1] i.e. this one.
Re: 1184: "Circumference Formula"
oliphaunt wrote:"Earth prime"... is that the moon? (Seeing as prime/secundus/etc are usually used to indicate the nth body orbiting another body.)
It has been a while since I took Discrete Mathematics, so some of my terminology might be in error, but if I remember correctly the
'
symbol denotes a prime derivative of a function and the
"
symbol denotes a second derivative of a function.
So the cognitive dissonance created by the misuse of the terminology is where the humor lies.
tl;dr  We have been successfully trolled. (u mad bro?) O.o
There are two general categories of opinion: regular opinions and informed opinions.
Please do not argue with me unless your opinion falls into the latter category.
Please do not argue with me unless your opinion falls into the latter category.
 San Fran Sam
 Posts: 228
 Joined: Tue Nov 15, 2011 5:54 pm UTC
Re: 1184: "Circumference Formula"
I'm still looking for the first footnote.
Re: 1184: "Circumference Formula"
I'm sorry, I know I'm an idiot, but...I honestly don't get it.
Return to “Individual XKCD Comic Threads”
Who is online
Users browsing this forum: No registered users and 40 guests