2/ Remember that
— Alex Kontorovich (@AlexKontorovich) March 6, 2020
Area = Pi r^2
formula for a circle? That’s not really the formula. It should be:
Area = radius x (half circumference),
where circumf=Pi*diameter, so half of that is Pi*radius.
Proof: cut your pizza into small slices and arrange into an r x (C/2) rectangle... pic.twitter.com/VVaj4vWRYb
Yeah, Mom always told us not to play with our food, but this Saturday is 3/14, so it's the annual holiday known as Pi Day. Teachers may want to celebrate Friday with this kind of fun demonstration of how pi relates to circles by using pizzas and pizza crust. But anyone can do it, and it's a great excuse to order five pizzas! Alex Kontorovich also invites you to the Pi Party this Friday at the National Museum of Mathematics in New York. -via Boing Boing
Also: Do you know where your Pi Day shirt is?