Chapter 2: An ancient theorem and a modern question

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Resources

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


Art

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