radius

You should always order the bigger pizza. While an 8“ pizza is roughly 50 square inches, a 16” pizza is 200 square inches, which is 4 times bigger but most pizza places charge by radius and don’t consider the overall area of the pizza. An NPR study found that one 20” pizza is actually bigger than two 14” pizzas, but is also, on average, $9.00 cheaper. Source

Benjamin Franklin - Magic Circle, “Experiments and Observations on Electricity”, 1750.

Each radius of this Magic Circle (including the center entry) sums to 360, as does each annulus. Franklin has also highlighted 20 “excentric” annuli, each of which, together with the central 12, sums to 360. 

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Radius Behind the Scenes