Chapter 45
Below are links to pages with diagrams of the mathematical theorems and tools described in chapter 45
The Theorem of Thales http://www.vias.org/comp_geometry/geom_thales_theorem.html
The proof of Pythagoras's Theorum http://www.mathsisfun.com/pythagoras.html
Pythagorean Triples http://www.mathsisfun.com/pythagorean_triples.html
Platonic solids http://www.uwgb.edu/dutchs/symmetry/platonic.htm
Sieve of Eratosthenes http://www.murderousmaths.co.uk/books/MMoE/erat.htm
Archimedes's Method http://lesbillgates.hubpages.com/hub/Mathematical-greats-Archimedes
