An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of the bridge and its loads partially into a horizontal thrust restrained by the abutments at either side. A viaduct (a long bridge) may be made from a series of arches, although other more economical structures are typically used today.
either different materials or a stronger base/structure
The bridge is supported by an arch or a series on arches to make the bridge stronger.
The could be made longer and stronger. (learn to use grammar fag)
It depends on your definition of "strongness". Pasta can be more rigid, but toothpicks have more flexibility, depending on conditions. Like everything else, it depends on the rules.
we use wood for make bridge strong
a truss
because of the support of the circles
because it is less stronger than the sides of the bridge.
Everything else being equal, a shorter bridge is stronger: it will weigh less, and therefore will not have to support so much of its own weight.
Because it has more support in its arches.
The arch bridge design makes it stronger because it has support underneath
Yes, but the bridge depends on its age. The older it is, the weaker the bridge is. The younger it is, the STRONGER the bridge is.