“If you put root beer in a square cup, does it become beer?” (joke)

A math joke is told about square roots and root beer. “If you put root beer in a square glass do you get beer?” was cited on Twitter on May 15, 2012. “If you put root beer in a square cup, does it become beer?” was cited on Twitter on June 7, 2012.
 
The math joke quickly became very popular and has been printed on many images.
 
“What’s a math teacher’s favorite drink?”/“Root beer” is another math and root beer joke.
 
   
Twitter
Judson W. Buescher
‏@JudsonBWx
If you put root beer in a square glass do you get beer?
7:27 PM - 15 May 2012
 
Twitter
Pandeism Is Possible
‏@Pandeism
http://tmblr.co/ZsPYJwMjlOy8 If you put root beer in a square glass do you get beer?
1:15 AM - 4 Jun 2012
 
Twitter
Devin Cartelli
‏@tittystreet
If you put root beer in a square cup, does it become beer?
12:36 AM - 7 Jun 2012
 
League of Legends
I put root beer in a square cup
Joseph Moffett
07-02-2012
Now i just have beer :/
   
Google Groups: WANAKENYA
Re: [PK] ON A SERIOUS NOTE THOUGH
Kuria-Mwangi
12/28/12
(...)
If you put root beer in a square cup, do you get beer?
 
Twitter
Dyxlesic
‏@eddie_rod
Pouring root beer in a square glass will turn it into just beer! pic.twitter.com/ej3tzS4YRX
Owosso, MI
7:52 PM - 24 May 2014
 
Twitter
Andrew Wall‏
@Awall1894
What’s a math majors favorite drink? Root beer in a square glass 😂😂😂😂😂 #MathJokesForDays
10:27 AM - 9 Sep 2014
 
Reddit—Jokes
I poured my root beer into a square cup
submitted May 25, 2015 by Kattladee
Now I’ve just got beer.
 
Google Books
Bad Science Jokes
Jokes For Alkynes of Scientists
By Melissa Miller
Lulu Publishing (Lulu.com)
2016
Pg. 72:
I put root beer in a square cup and now it’s just beer.