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.
An Arch
a truss
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.
The Egyptians invented the structure that was known as the pyramid
A pyramid is a prism
A true pyramid is a pyramid with a point on the end and very straight structure
A pyramid.