why do we build rectangular houses and not round houses?

Question

I mean houses in Europe and America have 4 corners (or more) whereas in Africa Natives build round houses (also in Asia afaik).
Do they have any advantages or disadvantages? Or is one solution cheaper, …?

In: 50

Answer 1

Interestingly round houses are most efficient for Square footage / Material.

Though I must say it would make urban planning quite a bit more difficult