
 Euclid  Hutchinson encyclopedia article about Euclid (Site not responding. Last check: 20071022) 
  Euclid's works, and the style in which they were presented, formed the basis for all mathematical thought and expression for the next 2,000 years. 
  The first six books deal with plane geometry (points, lines, triangles, squares, parallelograms, circles, and so on), and includes hypotheses such as Pythagoras' theorem, which Euclid generalized, and the theorem that only one line can be drawn through a given point parallel to another line. 
  In book 10 Euclid treats irrational numbers, and books 11 to 13 discuss solid geometry, ending with the five Platonic solids (the tetrahedron, octahedron, cube, icosahedron, and dodecahedron). 
 encyclopedia.farlex.com /Euclid (610 words) 
