Pi r squared
Apparently loads of people didn't pay attention in GCSE maths, as they are astounded that the area of a 18-inch pizza is bigger than the area of two 12-inchers.
An 18-inch pizza has 254 square inches of pizza, whereas two 12-inch pizzas only have around 226 square inches.
The classic way of working out the size of a circle is dividing its diameter by two to work out the radius, then squaring it and multiplying it by pi. Which works out the total area of the circle (or pizza).
https://twitter.com/fermatslibrary/status/1082273172114862083
The amount of multiplication means that small changes in the diametre of the pizza lead to much bigger changes in the area.
A 10-inch pizza, for example, is 78 square inches, with a 12-inch pizza a comparative 113 square inches. A 14-inch pizza comes in at 153 inches, so roughly the same size as 10-inchers.
All of this is worth bearing in mind when you're ordering and working out the most cost-effective option.
And, judging by social media, a lot of people's minds were blown:
https://twitter.com/MarkSykes15/status/1082274473737359366?
https://twitter.com/rscotteisenberg/status/1082284996134649856?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1082284996134649856&ref_url=https%3A%2F%2Fwww.news18.com%2Fnews%2Fbuzz%2F18-inch-pizza-has-more-pizza-than-two-12-inch-pizzas-and-the-internet-is-losing-its-pizza-mind-1995051.html
https://twitter.com/RickestOf_Ricks/status/1082285108537769986
https://twitter.com/DrCDArmstrong/status/1082273718750138368
