# Math

**Popular Topics**## Teaching Math

## Probability & Statistics

## Geometry

## Calculus

## Number Theory

## Popular & Elementary Math

## Number Systems

## Algebra

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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 develop a Truncated Cone

Follow these instructions below to develop a truncated cone. A truncated cone is a conical shape which has had it's top cut off at an angle. Sometimes you might need to develop these truncated cones as duct elements....

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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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### 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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### Mollweide's Formula Proof | Triangle Trigonometry

Mollweide's Formula for the angles and sides of a triangle Mollweide's Formula (actually, a pair of formulas) is an equation that relates all three side lengths and angles of a triangle. If a triangle has sides of...

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