For reasons that don't matter, I needed to calculate the volume of a disk (i.e. cylinder), a task I haven't done in forever, so that formula is not on my favorites list. Turns out that one smart guy turned that volume equation into a pizza formula. If you assign the letter "z" to represent the pizza's radius and the letter "a" as the depth of the pie, the formula for the volume becomes the easy-to-remember...
Volume = Pi*z*z*a
Math geeks might prefer their notation, V = πr2h, but I'm going with Pizza!
https://www.quora.com/What-is-the-formula-for-the-volume-of-a-disk
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