ARCHIMEDES PRINCIPLE

Archimedes was not just a mathematician, he was also an inventor, and a engineer.  He was born in  Syracuse,Sicily and lived in the year 250 B.C ( about 2,260 years ago).  One day a craftsman made a crown for the king and Archimedes didn't think that the crown was real.  Archimedes used what he called  Archimedes Principle and found the density of the metal in the crown.  He also found out that when you put something in the water the water would rise or displace, this is called displacement.  When he got in the bath he found out that his body was lighter in the water and he jumped out of his bath running and yelling Eureka ( Which is the Greek word for "I have found it").  

He also created great things in his life which some of us like today.  Archimedes created what he called "Block and Tackle" which meant that he could move things without having any trouble.  He created the screw pump which meant he could move water from a low place to a high place without trouble also.   Archimedes used what he called the sand reckoner and he used that to calculate the number of grains of sand there were in the world (kinda weird right).  He invented war machines to help protect his city and he thought that his inventions were the best inventions every created.