If the price is the same, which is the better buy: a round pizza with a diameter of 10 inches or a 9 inch, square pizza?

Question

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Answer 1

The area of a square is side * side and the area of a circle is pi * (radius)^2

9^2 =81

pi=3.14

pi*5^2

3.14*25=3.14*(100/4)=314/4=157/2=78.5

The square pizza is bigger.

Answer 2

The area of the square pizza is 9*9= 81 sq inches.

The area of the round pizza is 25π = a little more than 78.5 sq inches.

The better deal is the pizza with the larger area.