Portal:Chapter 2: An ancient theorem and a modern question

Description goes here.

<< Previous Chapter Table Of Contents  next chapter >>

Preliminaries
Arithmetic: A Visual Guide

Interactive
Pythagorean Theorem Proof by Community Contributor @TimAlex

Euclidia

Euclid’s Elements

Videos
Playing Sports in Hyperbolic Space

Ditching the Fifth Axiom

The Essence of Linear Algebra

Books
The Four Pillars of Geometry by John Stillwell

Linear Algebra Done Right by Sheldon Axler

See More
<< Previous Chapter Table Of Contents  next chapter >>