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Mathematician Answers Geometry Questions From Twitter | Tech Support | WIRED

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Mathematician Jordan Ellenberg answers the internet’s burning questions about geometry. How are new shapes still being discovered? Where are we using Pythagorean theorem in real life? How many holes are in a…straw? Ellenberg answers all these questions and much, much more!

Jordan Ellenberg’s book Shape is available on Amazon or Penguin Random House
https://www.amazon.com/gp/product/1984879073?tag=randohouseinc7986-20https://www.penguinrandomhouse.com/books/612131/shape-by-jordan-ellenberg/
https://www.amazon.com/gp/product/1984879073?tag=randohouseinc7986-20https://www.penguinrandomhouse.com/books/612131/shape-by-jordan-ellenberg/

Director: Lisandro Perez-Rey
Director of Photography: Constantine Economides
Editor: Richard Trammell
Expert: Jordan Ellenberg
Line Producer: Joseph Buscemi
Associate Producer: Brandon White
Production Manager: D. Eric Martinez
Production Coordinator: Fernando Davila
Casting Producer: Nick Sawyer
Camera Operator: Christopher Eustache
Gaffer: Rebecca Van Der Meulen
Sound Mixer: Michael Guggino
Production Assistant: Sonia Butt
Post Production Supervisor: Alexa Deutsch
Post Production Coordinator: Ian Bryant
Supervising Editor: Doug Larsen
Additional Editor: Paul Tael
Assistant Editor: Billy Ward

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32 comments

@allanskjonsberg5553 January 23, 2025 - 12:38 am
"Imagine a person with no sense of purpose" that's not going to be hard for me 😅
@lukestertubeplayz January 23, 2025 - 12:38 am
I like to define a “Hole” as a region of Entrance, and Passage. For the purpose of my point an Entrance acts as a doorway you can enter and exit via a “doorway”, A passage is always accessed via an Entrance or Entrances. The straw and closed straw both have 1 hole Because both has At least 1 Entrance and a Passage via an Entrance. And a donut also has one hole via my definition.
@JamesMcCullough-lu9gf January 23, 2025 - 12:38 am
5:55 that isnt a hole anymore its just a pocket
@ronray3293 January 23, 2025 - 12:38 am
A botte has zero holes.. its just a disc with very high and tapered walls
@MoreAmerican January 23, 2025 - 12:38 am
4:14 geologists eat pringles upside down?
@emmagonzalez2005 January 23, 2025 - 12:38 am
no tengo idea de por qué me vi todo el video pero me lo vi los 18 minutos
@Patrick_McLendon January 23, 2025 - 12:38 am
In defense of the Pythagorean Theorem, if you wan to build anything, like a house or a cornhole game, you need to use this rule.
@d4vidh4xor January 23, 2025 - 12:38 am
6:15, bagel has two holes once it's sliced in half
@needfoolthings January 23, 2025 - 12:38 am
Here's my practical philosophy: a straw IS a hole.
@deroude January 23, 2025 - 12:38 am
well, if you give me a string, I can give you a square angle :) goes without saying ancient Egyptians knew the empyrical version of Pythagora's theorem well before he was born.
@WhiteOvertoneMirror January 23, 2025 - 12:38 am
What would you say to those, like me, that say that a straw is just hundreds if not thousands of holes stacked on top of eachother?
@samuelmatheis January 23, 2025 - 12:38 am
11:32 thanx man, show them USA-people how Einstein is pronounced. To me as a german it is like a soothing fresh selfmade lemonade with ice cubes on a hot day when I hear Aynshtyne during an english speech instead of the oh so usual Aynstine.
@LeonardoTaglialegne January 23, 2025 - 12:38 am
7:50 because they're the bestagons
@ameliaross3552 January 23, 2025 - 12:38 am
I just used the Pythagorean theorem to determine the length of a table runner. I had a square table with six foot sides. The table runner needed to run diagonally across the table. How long does the runner need to be? Pythagorean theorem!
@jacobkuca7711 January 23, 2025 - 12:38 am
i was definitely expecting him to talk about the straw in a topological sense... when he triumphantly implied that a water bottle has a hole in it, i got peeved. a water bottle doesn't have any holes. it's just a sort of 'expanded dip'. it's like saying that a bowl has a hole in it... if it did, your soup would fall out. a bowl is just a curved plate. plates do not have holes. bowls do not have holes. water bottles do not have holes.
@preludedude4765 January 23, 2025 - 12:38 am
If you pinch a straw at one end it has zero holes. It has a cavity and is mathematically a complete shape with zero holes
@Iamwood1005 January 23, 2025 - 12:38 am
03:52 @3omega2 asked how to use the pythagorean theorem to solve problems in life.. well long answer short, get a job at a roofing company that builts hip roofs, or a job as an urban lumberjack. Pythagorean theorem will be your best friend after that.
@KBM_Studios January 23, 2025 - 12:38 am
The second half of that algebra question asked for the difference between geometry and topology. That's a great question! Sad he skipped over that
@Paige_Scottie January 23, 2025 - 12:38 am
how can you talk about 4d shapes then not understand a straw has 1 hole and a straw has 2 holes? its not one or the other its both and neither
@PtotheMtotheK January 23, 2025 - 12:38 am
Zero holes in a straw? HUH??
@mikicoal January 23, 2025 - 12:38 am
There are no holes in a straw. There is no such thing as a hole. A hole is an absence of thing.
@ohokay2013 January 23, 2025 - 12:38 am
pinches bottom Me: "half a hole"

Also how many holes would a y-shaped straw have? 3? But they're all connected. And the same exercise of shortening the length of the straw yields something like underwear, which virtually everyone would agree has 3 holes.
@stevendeans4211 January 23, 2025 - 12:38 am
There are no holes in a functional straw.
@nalanl January 23, 2025 - 12:38 am
My least favorite math... probability. It's the only one that breaks my brain a little
@nalanl January 23, 2025 - 12:38 am
It is 1 hole.... Through an elongated cylinder.
@yosoyflips January 23, 2025 - 12:38 am
So a tesseract is a small cube inside of a bigger cube and you connect the corners?
That's still just 3 dimensions!!
@MikeeBacon January 23, 2025 - 12:38 am
"The Arithmetic of Holes" is an excellent name for a biography
@mikeashley9578 January 23, 2025 - 12:38 am
The US military has an officer functional area for every component that is very math heavy. They're usually statisticians or computer programmers, though they don't have to be. The Army calls them ORSAs (Operations Research System Analyst). In the Army, it's currently called FA49.
@flowingafterglow629 January 23, 2025 - 12:38 am
Wouldn't it be correct to say that a straw has zero holes in torroidal geometry?

I think that's what your bagel analogy shows.

To have a straw with a hole, you'd have to poke one in the side.

I am a "zero holer" because "hole" is defined within a given geometry.
@pedromazzetto4722 January 23, 2025 - 12:38 am
7:36 BECAUSE HEXAGONS ARE THE BESTAGONS :DDDD
@michaeldietch January 23, 2025 - 12:38 am
Another way to think about the straw... There are No holes in it at all! Like a moebius strip. The straw itself is the structure surrounding that tunnel?
@lucasmoraesduque6681 January 23, 2025 - 12:38 am
7:36 BEEcause hexagons are the bestagons :D

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