Explanation:
So many people ask this question that Google automatically adds an answer when users search for keywords on the Search bar. Many people wonder: why is the pizza round, but the box is not always round for consistency? But in fact, a square or rectangular box is the best choice.

It's simple, if you put a round cake in a round box that fits tightly, there will be no space to take the cake out. But if you put the cake in a larger round box, the cake will "float freely" when transported. On the contrary, a square box will have a fairly large space on the 4 sides, just enough for you to put your hand in to take it out, while also fixing the cake so it doesn't "float" around.

In addition, producing a square or rectangular box is much simpler than a round one, it is very simple, and can be assembled on the spot. Round boxes take more effort and cost to produce, not to mention the time it takes to manually stack the cakes. In addition, square boxes also help save more space, creating stability when loaded into a truck to transport everywhere.
If you understand the reason why pizza is round, you can also deduce the basis for the slice to be cut into a triangular shape, originating from the centrifugal force when making pizza, the cut line will be the diameter passing through the center of the pizza.
Cutting a triangular cake is also easier and simpler than in other shapes. Just think, now if you cut a pizza into square or round pieces, how many people have the ability, and it also takes much more time. Just a few quick slices can divide a large cake into many equal triangular pieces.

In addition, bakers and diners also believe that eating pizza slices will create a more delicious feeling because you bite from small to large pieces, stimulating the appetite.