How to lie using visual proofs

Three false proofs, and what lessons they teach.
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Here's a nice short video on the false pi = 4 proof
   • Why All Youtubers Are WRONG About Thi...  

Time stamps:
0:00 - Fake sphere proof
1:39 - Fake pi = 4 proof
5:16 - Fake proof that all triangles are isosceles
9:54 - Sphere "proof" explanation
15:09 - pi = 4 "proof" explanation
16:57 - Triangle "proof" explanation and conclusion


Thanks to these viewers for their contributions to translations
French: azerty314159
Portuguese: Wagner K. Martins

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These animations are largely made using a custom python library, manim. See the FAQ comments here:
https://www.3blue1brown.com/faq#manim
https://github.com/3b1b/manim
https://github.com/ManimCommunity/manim/

You can find code for specific videos and projects here:
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Music by Vincent Rubinetti.
https://www.vincentrubinetti.com/

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