Part one of term paper
and The Use of Geometry in Their Design What is a bridge? A bridge is a structure providing continuous passage over a body of water, roadway, or valley. Every bridge looks different from the another. Their bridge structure is different. There are nine types of main bridges. Bridge engineers use a lot of geometry to help them design the d ...

Part two of term paper
... the most common type known to the ancients, although according to the tradition a brick-arch bridge was built about 1800 BC in Babylon. Other forms, such as simple suspension and cantilever bridges, are known to have been used in ancient India, China, and Tibet. Pontoon bridges were used in the military expeditions of the Persian monarchs Darius I and Xerxes I. The Romans built many timber-trestle bridges. Surviving roman bridges, however usually have a level road supported on one or more se ...