Heron of Alexandria
lived from 10 to 75

**Heron** or **Hero of Alexandria** was an important geometer and worker in mechanics who invented many machines including a steam turbine. His best known mathematical work is the formula for the area of a triangle in terms of the lengths of its sides.

*Find out more at*:

http://mathshistory.st-andrews.ac.uk/Biographies/Heron.html