If anyone is confused, this is because area is the square of radius (and Pi, but that factors out when comparing)
So a pizza twice as wide is 4 times as much food.
Doing the math, that means a 10 inch pizza is more than two 7 inch pizzas for example (and that scales, so 20 and 14*2, etc. A really close example is that a 17 inch pizza is just barely more than two 12s. Of course the same thing would work in centimeters, but with bigger numbers or smaller pies)
If anyone is confused, this is because area is the square of radius (and Pi, but that factors out when comparing)
So a pizza twice as wide is 4 times as much food.
Doing the math, that means a 10 inch pizza is more than two 7 inch pizzas for example (and that scales, so 20 and 14*2, etc. A really close example is that a 17 inch pizza is just barely more than two 12s. Of course the same thing would work in centimeters, but with bigger numbers or smaller pies)