# Math

• Subtopics
• 3

### How to Solve Word Problems Using , "Let Statements"

6 years ago

This is the second installment in my series of math problems that tend to trip people up. This time we will be using let statements and algebraic expressions to solve word problems.

• 3

### How to Organize a Math Fair

7 years ago

There is more to mathematics than letters of the alphabet. This month, I and my colleagues decided to organize our first Math Fair for our classes. Math Fairs are one way to get students away from their textbooks for a bit and into the actual fun,...

• 7

### Standard Deviation and Variance By Hand: Steps to Calculate

5 years ago

Simple step-by-step guide to calculate the standard deviation by hand and in Excel with explanation of variance. Example is provided along with a quiz question.

• 7

### How To Convert From Cm To Inches (And Back)

7 years ago

Learn how to convert from cm to inches and backward from inches to cm. This conversion is quite simple and easy to comprehend. I will show you basic formulas for better understanding of relation between measurement units. In addition you can find here practical examples for using formulas and many...

• 114

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

5 years ago

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 code that affects every person on...

• 8

### Arc Length Calculation Given Only the Chord Length and Arc Height (Sagitta)

6 years ago

This article shows how to calculate the arc length when only given the chord length and the sagitta (the arc height perpendicular to the chord), with an illustration of how the formula is derived.

• 5

### Fractal Geometry :: Fractals in Nature

8 years ago

A fractal is defined as a "rough or fragmented geometric shape that can be split into parts, each of which is (at least approximately) a reduced-size copy of the whole," according to their "discoverer" Benoit Mendelbrot (Nov. 20, 1924 – Oct. 14,...

• 6

### Christiaan Huygens; a Forgotten Genius of Science

5 years ago

Many of the greatest minds in history are little known by the general public. One such genius was Christiaan Huygens. This page briefly relates his life story and his accomplishments in the sciences.

• 12

### Algorithms and Logarithms: a User's Guide

7 years ago

If you, a non-mathematician, sometimes confuse the terms "algorithm" and "logarithm," you can find clarity here, from another non-mathematician.

• 23

### Importance of Basic Mathematics

10 years ago

Mathematics is the study of numbers, and counting, and measuring, but that is only the beginning. Mathematics involves the study of number patterns and relationships, too. It is also a way to communicate ideas, and perhaps more than anything, it is...

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