# Math

**Popular Topics**## Probability & Statistics

## Teaching Math

## Geometry

## Calculus

## Applied Mathematics

## Number Systems

## Popular & Elementary Math

## Algebra

## Number Theory

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### The Number 9 | The Secret Knowledge of The Ancients Number Nine Code 911

The number 9 is the last number in a base 10 system which is the last and limit of all that is. Nine is a number which has many interesting qualities that other numbers do not have and has been used to hold a hidden...

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### How to Learn Algebra Fast and Do Equations. Plus, Problems with Solutions.

No website hoops. On the front page. Math rules for algebra. Algebra and equations for beginners. Complete lessons.

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### Inscribed Circles and Hexagons | 7 Hard Geometry Problems

Geometry problems involving circles inscribed in regular hexagons and regular hexagons inscribed in circles can be solved the same way as problems involving circles and equilateral triangles. The key geometric...

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### 17 Geometric Shapes You've Never Heard of

Strange Shape Names: Obsure and unusual geometric shapes and names of shapes, 17 weird shapes you probably don't know...

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### Early Proofs of the Pythagorean Theorem By Leonardo Da Vinci, Ptolemy, Thabit ibn Qurra, and Garfield

Though we all know how to use the Pythagorean Theorem, few know of the many proofs that accompany this theorem. Many of them have ancient and surprising origins.

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