There are three different types of tessellation:

**1. translation****2. rotation****3. reflection**

Mathematics uses many concepts in threes. The first structure mathematically is a triangle. There are acute, right, and obtuse angles. Trigonometry is the study of the relationship of the sides of a triangle. Have your heard of Pascal's Triangle?

There are three different types of tessellation:

**1. translation****2. rotation****3. reflection**

The minus sign for a negative fraction (a rational number) can be in one of three places. It can be in front of the fraction, assigned to the numerator, or assigned to the denominator. In all three cases, the fraction is negative.

Three types of averages are the mean, mode and median. The weekly salaries of six employees at McDonalds are $140, $220, $90, $180, $140, $200. For these six salaries, find: (a) the mean (b) the median (c) the mode.

List the data in order: 90, 140, 140, 180, 200, 220

Mean: 90+ 140+ 140+ 180 + 200 + 220 =

6

Median: 90,140,140,180,200,220

The two numbers that fall in the middle need to be

averaged. 140 + 180 = 160

2

Mode: The number that appears the most is 140

by Allan Adler

A magic square is an arrangement of the numbers from **1** to **n^2** (n-squared) in an **n**x**n** matrix, with each number occurring exactly once, and such that the sum of the entries of any row, any column, or any main diagonal is the same. It is not hard to show that this sum must be **n(n^2+1)/2**.

Continue reading Magic Square

Pascal’s Triangle was originally developed by the ancient Chinese, but Blaise Pascal was the first person to discover special patterns contained inside the triangle. They teach his ideas in various schools online in math courses. You probably also heard of this guy from your high school math teacher.

Triangular numbers appear in Pascal’s Triangle. In fact, the 3rd diagonal of Pascal’s Triangle gives all triangular numbers as shown below:

1

1 1

1 2 1

1 3 3 1

1 4 6 4 1

1 5 10 10 5 1

1 6 15 20 15 6 1

1 7 21 35 35 21 7 1

1 8 28 56 70 56 28 8 1

1 9 36 84 126 126 84 36 9 1

Generally, a trichotomy is a splitting into three disjoint parts. Continue reading Trichotomy

Computer Animation relating to the world of 3d modeling/animation depends upon concepts that form their rules around groups of three main pieces. Continue reading Computer Animation