- 
  
  Pythagorean Theorem
 Pythagorean Theorem a^2+b^2=c^2
- 
  
  
- 
  
  Irrational Numbers
 5th Century BC Pythagoras founded irrational numbers
- 
  
  
- 
  
  Eric Teaches Quadratic
 x=-b+-sqrt(b^2-4ac)/(2a)
- 
  
  17th century Calculus founded by Isaac Newton and Gottfried Leibniz
- 
  
  18th century Leonard Euler named i [sqrt(-1)] and pi [3.14159...]