Thales and The Egyptians
Lived about 624 BC to 547 BC in Miletus, Asia Minor (now Turkey)
Lesson Plans and Math Activities for This Topic
Thales MacTutor Bio http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Thales.html
"Water is the principle, or the element, of things. All things are water." Quoted in Plutarch, Placita Philosophorum
Thales is Famous for Measuring the Height of the Great Pyramid Using Ratios
Mathematical Contributions http://www.albertson.edu/math/History/ebeck/Classical/Thales%20Pages/mathematical%20contributions.htm
Shadow Geometry (Young Math Books)