Leibniz formula for π - Wikipedia
The staircase paradox, or why $\pi\ne4$
Sin pi/4 - Find Value of Sin pi/4 | Sin π/4
Pi is 4
How to Falsely Prove That Pi Equals 3: 7 Steps (with Pictures)
Cliff Pickover Twitterissä: "For you math nerds. A mysterious & wonderful proof that pi=4. At which step does it go wrong? https://t.co/WjXQzTIEv6" / Twitter
What Is Pi, and How Did It Originate? - Scientific American
undergraduate education - Impressive examples where a "proof by picture" goes wrong - Mathematics Educators Stack Exchange
Pi
Cliff Pickover no Twitter: "For you math nerds. A mysterious & wonderful proof that pi=4. At which step does it go wrong? https://t.co/JmcpTk5prv" / Twitter
geometry - The staircase paradox, or why $\pi\ne4$ - Mathematics Stack Exchange
Pi - Wikipedia
IntMath Newsletter: Runge-Kutta, March math, Webinar - Interactive Mathematics
DOES THE BIBLE SAY PI EQUALS THREE?
Troll pi explained @ Things Of Interest
217: e to the pi Minus pi - explain xkcd
Pi equals 4, prove me wrong. - Non-Ski Gabber - Newschoolers.com
Is Pi = 4 ? – Share Math Ideas
integration - False proof: $\pi = 4$, but why? - Mathematics Stack Exchange
American Scientist - Happy #PiDay! 👉 There are countless ways of computing pi, but almost all 19th-century calculators chose arctangent formulas. 👉 These methods begin with a geometric observation about a circle
File:Pi-equals-circumference-over-diametre.svg - Wikipedia
Pi = 4. What's wrong in this theorem? - Quora
Pi = 4. What's wrong in this theorem? - Quora
What if pi equaled 4? - Quora
![Self] pi is no longer 3.14 : r/theydidthemath](https://i.redd.it/4rmswd9kr8c61.jpg "Self] pi is no longer 3.14 : r/theydidthemath")