Type your answer here... arch
Royal Arch - structure - was created in 1853.
The bridge is supported by an arch or a series on arches to make the bridge stronger.
a truss
An Arch
A pyramid....
The arch is the strongest structure. The reason the others are sometimes used is the span is so long the arch isn't practicle.
Yes it is.
Circular structure.
A pyramid is a prism
The Egyptians invented the structure that was known as the pyramid
A true pyramid is a pyramid with a point on the end and very straight structure
A pyramid.