Can someone please answer me this.

The boring answer is they're far cheaper to make (just needs one piece of cardboard folded up), and also easier to store and carry several of at once (and the triangular corners make it harder to squash and so protects the context.

The real answer is pizzas are meant to be square too it's just that they're made by flamboyant chefs who like spinning dough, so end up as circles.

These places like making things complicated..😁

have you noticed, those are buttons on a play station controller?
Sony owns us

Those aren't triangles. They are sectors 😤😤😤 This is a triangle 🔺️

Some random guy today thrown a bag of Skittles at me and yelled and said "Taste The Rainbow!"

So I decided to hit him with my truck and yell back. Nationwide is on your side!

Unless it’s Sicilian style.

And we eat with mouth which is oval in shape.

And at the end of the day ,comes out cylindrically.

Why bother? Just eat and enjoy !

If you want to question why things have been done for centuries then do it , its human nature.