Ebook: The metaphysics of the Pythagorean theorem: Thales, Pythagoras, engineering, diagrams, and the construction of the cosmos out of right triangles

Metaphysics, geometry, and the problems with diagrams -- The Pythagorean theorem: Euclid I.47 and VI.31 -- Thales and geometry: Egypt, Miletus, and beyond -- Pythagoras and the famous theorems -- From the Pythagorean theorem to the construction of the cosmos out of right triangles.