Thales's Theorem

  • Published: 20 January 2019
    Get my favorite brain food delivered to your door:
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    Wask (strange objects like the short-sided ruler):
    Thales's Theorem on wikipedia:
    Thales's Theorem is a special case of the inscribed angle theorem:
    "axiom" vs "postulate" vs "theorem":
    The axioms of Euclidean plane geometry:
    sum of internal angles in a triangle:
    parallel theorems:
    more circle theorems:
    angles opposite equal sides in a triangle are equal:
    Hosted by
    Michael Stevens
    Edited by
    Hannah Canetti
    instagram: @hannaynaycanaynay
    VFX by
    Eric Langlay
    Music by Jake Chudnow and from AudioNetwork
    ***VSAUCE LINKS***

Comments • 6 976

  • ZReC
    ZReC  22 घंटे पहले

    EXTRA THICC 08:07

    • starlino
      starlino  2 दिन पहले

      You only proved it in one direction, i.e. diagonal=> 90deg. For complete proof you also need 90deg=> diagonal. That would be trivial, but you set bad habits for students not to prove theorems completely.


        I think u r very hyper active in childhood then y don't u become Mathematician

        • 赤Prophecy IsTrue
          赤Prophecy IsTrue  6 दिन पहले

          At 00:10 😗😐😃

          • Aleksej Rockatansky
            Aleksej Rockatansky  7 दिन पहले

            Not too bad.

            • Ishari
              Ishari  7 दिन पहले

              I knew all of that since middle school, but boy, it all connects so beautifully

              • Archie Lay
                Archie Lay  8 दिन पहले


                • Fishing Appalachia
                  Fishing Appalachia  9 दिन पहले

                  thanks dude! going into geometry in high school, and wow, this was helpful.

                  • ATC SKILL
                    ATC SKILL  9 दिन पहले

                    What the heck was that intro

                    • Erald Kaziu
                      Erald Kaziu  9 दिन पहले

                      That is the way trigonometry should be explained, take note teachers

                      • sippy_ jan
                        sippy_ jan  10 दिन पहले

                        omg..i wish u taught high school math!

                        • ShayAway
                          ShayAway  13 दिन पहले

                          Somehow compbutt sounds *exceptionally* dirty

                          • İlayda KAMALI
                            İlayda KAMALI  13 दिन पहले

                            It was like i was a middle school student again

                            • just some nachos
                              just some nachos  15 दिन पहले

                              "Cumbutt" Michael Stevens, 2019

                              • EndlessSmart963
                                EndlessSmart963  15 दिन पहले

                                You can also use the intersection point of right bisectors in a triangle. Make sure the circle is the largest that can fit inside the triangle. This is called the circumcenter.

                                • Kristian Kolbe
                                  Kristian Kolbe  15 दिन पहले

                                  Yeah, I GUESS vsauce is educational, but I'm pretty sure Michael just uses stem as a vehicle for his PERFORMANCE/CONTENT ART.

                                  • Drum Gamer
                                    Drum Gamer  16 दिन पहले

                                    Bruh my brain. This took me back to HS geometry.

                                    • pratheep kumar
                                      pratheep kumar  17 दिन पहले

                                      0:26 wow!!

                                      • Konsta Kh
                                        Konsta Kh  18 दिन पहले

                                        He loses his mind even more every episode... Michael dear. Are you ok??

                                        • coolintruddle
                                          coolintruddle  18 दिन पहले

                                          Geeze, thanks for reminding me how much I've let my maths knowledge slide. I am going to rewatch this with a compass and ruler.

                                          • William Sigunov
                                            William Sigunov  19 दिन पहले

                                            "Is there anyone who doesn't love making circles?" All the artists in the audience collectively groan.

                                            • Zac Mersal
                                              Zac Mersal  19 दिन पहले

                                              you had my like at combutt

                                              • Nick Irwin
                                                Nick Irwin  20 दिन पहले

                                                I hope that "combutt" was a jab at youtube for making you change dong to ding

                                                • Wyatt Duthie
                                                  Wyatt Duthie  20 दिन पहले

                                                  I love circles so much! Even when you think you knew all the tricks, there is still more to learn about them.

                                                  • Edgar Allan Dela Cruz
                                                    Edgar Allan Dela Cruz  21 दिन पहले

                                                    Michael is just Sam from College humor but bald

                                                    • Sebastian Gudiño
                                                      Sebastian Gudiño  21 दिन पहले

                                                      Hey you are using "The Elements" to do geometry! Euclid would ve proud

                                                      • Koleno
                                                        Koleno  21 दिन पहले

                                                        this is so gae tbh

                                                        • Michael Liechti
                                                          Michael Liechti  21 दिन पहले

                                                          Comic Sans. Really?

                                                          • Clare Kuehn
                                                            Clare Kuehn  21 दिन पहले

                                                            Nice, but the famous name Thales is pronounced "THAY-lees". 😐

                                                            • LO3D
                                                              LO3D  21 दिन पहले

                                                              I think I just got a little bit smarter.

                                                              • Albert Bazinyan
                                                                Albert Bazinyan  21 दिन पहले

                                                                That alone challenge really did get to him

                                                                • Andrew Wutsit
                                                                  Andrew Wutsit  21 दिन पहले

                                                                  You make me excited about math...thats hard to do.

                                                                  • Andrew Wutsit
                                                                    Andrew Wutsit  21 दिन पहले

                                                                    So this is where you went!!! I thought you got silenced or something went off the grid maybe but no, you've been making videos this whole damn time and here I was, binging your old channel and missing you

                                                                    • Tristan Stepleton
                                                                      Tristan Stepleton  21 दिन पहले

                                                                      I got that exact same the elements book from a book fair really suprised to see it in a Dong video

                                                                      • Philipthesquid
                                                                        Philipthesquid  22 दिन पहले

                                                                        Combutt is so much worse than compass

                                                                        • Alexander Nguyen
                                                                          Alexander Nguyen  22 दिन पहले

                                                                          I want to hear "hey, D!NG. Michael here"

                                                                          • Fien Muller
                                                                            Fien Muller  22 दिन पहले

                                                                            I still can't believe how funny this man is

                                                                            • AA a
                                                                              AA a  22 दिन पहले

                                                                              00:13 cute

                                                                              • Civil Warlord
                                                                                Civil Warlord  22 दिन पहले

                                                                                *Hey Dingalings, Michael here.*

                                                                                • Alex Sanchez
                                                                                  Alex Sanchez  23 दिन पहले

                                                                                  really thought he was guna use the elements book for the elements... not the book. lol

                                                                                  • APEX REAP3RZ
                                                                                    APEX REAP3RZ  23 दिन पहले

                                                                                    Where was this when I was doing my GCSEs. Basically could've skipped an entire term

                                                                                    • Rob Scales
                                                                                      Rob Scales  23 दिन पहले


                                                                                      • SirenaCalavera
                                                                                        SirenaCalavera  23 दिन पहले

                                                                                        Thanks to this video I remembered how much fun I got at school with math when I was a kid. I even miss going to school lol

                                                                                        • Jacob Esposito
                                                                                          Jacob Esposito  23 दिन पहले

                                                                                          Where can I get a cuntbutt

                                                                                          • computergeek 101
                                                                                            computergeek 101  23 दिन पहले

                                                                                            Shouldn’t the title be “Thales’ Theorem” and not “Thales’s Theorem”?

                                                                                            • Magnymbus
                                                                                              Magnymbus  23 दिन पहले

                                                                                              This would have been a less silly bill nye episode if not for the making out with a skull and the "compbutt" bits. It was very well dictated and demonstrated. ⭐⭐⭐⭐⭐

                                                                                              • kristian murphy
                                                                                                kristian murphy  23 दिन पहले

                                                                                                What's in the green book? With the ruler on top.

                                                                                                • John Doe
                                                                                                  John Doe  23 दिन पहले

                                                                                                  Brilliant start with the opening credits.

                                                                                                  • Red
                                                                                                    Red  23 दिन पहले

                                                                                                    *and bad.*

                                                                                                    • cristian gomez
                                                                                                      cristian gomez  23 दिन पहले

                                                                                                      Visit vihart, you'll love her

                                                                                                      • SkanMLL
                                                                                                        SkanMLL  23 दिन पहले

                                                                                                        a month worth of geometry class in 23 minutes

                                                                                                        • Omer Duchovne
                                                                                                          Omer Duchovne  24 दिन पहले

                                                                                                          I really liked the video! But I have to point out that you didn't fully explain it.. You didn't prove that a right angle will *only* fall on a diameter... In other words maybe there are other lines across the circle that are not the diameter but have right angle triangle. I know that there are no such lines!! But since you explained in so much detail the other axioms in my opinion it's only fair to explain it too.. Anyway great video and as always, thanks for reading

                                                                                                          • Josh Jo
                                                                                                            Josh Jo  24 दिन पहले

                                                                                                            Hanzo, Reporting for Duty

                                                                                                            • Commentur The Great
                                                                                                              Commentur The Great  24 दिन पहले

                                                                                                              I don't like drawing circles. Fight me.

                                                                                                              • Peter Odugbile
                                                                                                                Peter Odugbile  24 दिन पहले

                                                                                                                Isn't this just a manipulated circle therorm

                                                                                                                • Ezequias Lopes
                                                                                                                  Ezequias Lopes  24 दिन पहले

                                                                                                                  That gold watch makes me want to be a youtuber.

                                                                                                                  • MrHatoi
                                                                                                                    MrHatoi  24 दिन पहले

                                                                                                                    5:50 reminded me of "Whoops, I dropped my monster condom that I use for my Magnum Dong"

                                                                                                                    • Tobias Wahl
                                                                                                                      Tobias Wahl  24 दिन पहले

                                                                                                                      What you proofed is: If AB is a diameter, then the angle is a right one. But at the begin of the video you used the reverse: Since the angle at C is a right one, AB must be a diameter.

                                                                                                                      • David Rose
                                                                                                                        David Rose  24 दिन पहले

                                                                                                                        Michael: * about to say compass * Michael: oh, I'm sorry. This is a family show. * proceeds to say cum butt for 3 minutes *

                                                                                                                        • Sean Freeman
                                                                                                                          Sean Freeman  24 दिन पहले

                                                                                                                          Damn you’re good Michael Stevens

                                                                                                                          • Bilbo Wagons
                                                                                                                            Bilbo Wagons  24 दिन पहले

                                                                                                                            He might as well make another channel called who’s there

                                                                                                                            • Aaron Everett
                                                                                                                              Aaron Everett  25 दिन पहले

                                                                                                                              When did this channel come along? I like it much more than the main channel.

                                                                                                                              • Logan Wahl
                                                                                                                                Logan Wahl  25 दिन पहले

                                                                                                                                Compbutt sounds worse

                                                                                                                                • Gabriel Arsenault
                                                                                                                                  Gabriel Arsenault  25 दिन पहले


                                                                                                                                  • Somebresome
                                                                                                                                    Somebresome  25 दिन पहले

                                                                                                                                    Vsauce1 or gtfo Michael

                                                                                                                                    • PGHEWrexham
                                                                                                                                      PGHEWrexham  26 दिन पहले


                                                                                                                                      • A Person
                                                                                                                                        A Person  26 दिन पहले

                                                                                                                                        Every time he says compbutt *_god dammit I can't hold it together_*

                                                                                                                                        • chancegoondavis
                                                                                                                                          chancegoondavis  26 दिन पहले

                                                                                                                                          You just summed up the entirety of my highschool geometry class faster and better than my teacher lol

                                                                                                                                          • Justin Knox
                                                                                                                                            Justin Knox  26 दिन पहले

                                                                                                                                            Last year was my sophomore year and, this literally taught me as much as I learned last year😂

                                                                                                                                            • Orlando F Jaimes
                                                                                                                                              Orlando F Jaimes  27 दिन पहले

                                                                                                                                              I took geometry this past school year and I feel that I learned more here in a short video than in an entire school year.

                                                                                                                                              • Jason Fuller
                                                                                                                                                Jason Fuller  28 दिन पहले

                                                                                                                                                You look like Tobias in this. You should off found some cut off jean shorts.

                                                                                                                                                • Robert Pryor
                                                                                                                                                  Robert Pryor  28 दिन पहले

                                                                                                                                                  I wish I was high on potenuse

                                                                                                                                                  • Boii227 -Gaming and stuff-
                                                                                                                                                    Boii227 -Gaming and stuff-  29 दिन पहले

                                                                                                                                                    0:17 when your mom catches you cooking at 3AM

                                                                                                                                                    • mellepella
                                                                                                                                                      mellepella  29 दिन पहले

                                                                                                                                                      Damn, I want Michael as my math teacher... Heck, my teacher for every subject I have!!

                                                                                                                                                      • Nathaniel Black
                                                                                                                                                        Nathaniel Black  29 दिन पहले

                                                                                                                                                        Vsause teaches 10th grade Geometry