Cliff Pickover on Twitter: "For you math nerds. A mysterious & wonderful proof that pi=4. At which step does it go wrong? https://t.co/JmcpTk5prv" / Twitter
Cliff Pickover on Twitter: "For you math nerds. A mysterious & wonderful proof that pi=4. At which step does it go wrong? https://t.co/WjXQzTIEv6" / Twitter
Unit Circle Chart π (pi)
Q: π = 4? | Ask a Mathematician / Ask a Physicist
What is pi? | Live Science
The mystery of π = 4 – Zero
Pi is 4
Sin pi/4 - Find Value of Sin pi/4 | Sin π/4
Rhapsody on the Proof of Pi = 4 - YouTube
Sin pi/4 - Find Value of Sin pi/4 | Sin π/4
Pi
Radians
Pi = 4. What's wrong in this theorem? - Quora
geometry - The staircase paradox, or why $\pi\ne4$ - Mathematics Stack Exchange