Chapter 2: An ancient theorem and a modern question

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Preliminaries

Know how to visually represent addition, subtraction, multiplication, and powers
- Rethinking Arithmetic: A Visual Guide
Know what squares (powers of two) and square roots are
- Squares and Square Roots
Know what logarithms are
- Logarithms, Explained
Know what an equation and the solution of an equation is (note that an equation can have more than one solution!)
Now tie it all together
- Triangle of Power
And quick a introduction to radians
- What are radians? Simply explained

An additcting puzzle game where you do Euclidian constructions
- Euclidia
An interactive animated version of a proof of the Pythagorean Theorem
- Pythagorean Theorem Proof by Community Contributor @TimAlex

Understanding fractional powers
- What Do Fractional Exponents Mean?
A more in-depth description of the logarithms and exponents with applications
- Logarithm Fundamentals
Hyperbolic geometry
- Playing Sports in Hyperbolic Space
- Ditching the Fifth Axiom
A spot of linear algebra
- The Essence of Linear Algebra

To understand what geometry really is
- The Four Pillars of Geometry by John Stillwell
A guide through Euclid's Elements
- Euclid’s Elements
A more in depth introduction to linear algebra
- Linear Algebra Done Right by Sheldon Axler

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