because it helps to make the structure strong and it gives support. it also makes the structure look good
Aren't triangles structurally strong? So they are used in bridges and architechture.
The geometric shape used in truss bridges is the triangle.
Triangles are used in structures because a triangle is a very stable shape that cannot be stretched or squashed easily - unlike rectangles which can easily become parallelograms.
Triangles
Hyperbolic cosines, parabolas, semicircles, triangles are some shapes.
Concrete and steel .
The designs that are used to build bridges are designs that can keep them stable , working and that won't be dangerous also designs that amaze people.
The Romans used the arch to build large buildings and bridges.
so the bridge cant fall down when the cars are on it. And the triagles can keep i
Ones that make use of triangles.
brick,mud,wood
You can see triangles in stairs, stras, bridges, and Disney Epcot Center