Day 25: Heart of Mathematics

• Last time: The Pythagorean Theorem (including a geometric proof of the theorem using our kits!).

• Today:
  • "The Sexiest Rectangle" - or is it just cute? The Golden Section in Art and Architecture (or not?)

  • How to construct a golden rectangle (use a credit card?)

  • How to construct a logarithmic spiral

  • Let's look at the problems:
    • I.4
    • I.7
    • II.1
    • II.2
    • II.5
    Problem Assignment #3: hand in these problem solutions next Friday.

• Next time: The Platonic Solids Turn Amorous

Links:

• Two-dimensional Geometry and the Golden section
• Golden Section - An Overview