why are most roofs shaped like triangular prism instead of rectangular prism?

Answer 1

ever considered what happens when it rains?

its a past design

Answer 2

Perhaps the rain, snow, etc. are sliding off the roof easier. The rectangular shape would result with a straight horizontal roof, retaining much more water, which might take longer to evaporate, thus giving it a chance to get absorbed into the roof structure and make a damage.

As far as I know, even those rectangular-shaped roofs actually have an angle greater than 0, to enable the water draining. Plus, aside tradition, there might be some architectonic and other reasons (resistance to the wind, etc.), which should be further explored.

Answer 3

Triangular is chosen because it is more stable, it takes less material to construct, and rain and snow fall off it more readily, instead of collecting [tends to erode the roof surface] and adding weight to the roof.

A rectangular prism would be redundant, as well as unstable, and collect rain and snow.

A flat roof would use less material, but would not be as stable, and not let rain and snow off.

Answer 4

to make the rain roll off and because a triangular prism can lean on itself for support.

Answer 5

Primarily because it is more self supporting a d also requires much less extra stabilization than a rectangular structure

Answer 6

by using fact Trianges are a extra advantageous help gadget. they are the toughest shape of help. Plus rain and snow slide down the slope by using fact of gravity so which you do no longer ought to do it.