Square Pizza

If the price is the same, which is the better buy – a ten-inch round pizza or a nine-inch square pizza?
Source: NCTM Mathematics Teacher


Area of round pizza
\pi 5^2=3.14\times 25
=78.54 square inches
Area of square pizza
9^2=81 square inches
81 >78.54\rightarrow square pizza is a better buy.

Answer: Square pizza


About mvtrinh

Retired high school math teacher.
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One Response to Square Pizza

  1. Nick says:

    Interestingly, the volume of a round pizza of radius z and thickness a is pi*z*z*a. 😉

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