This is a math dictionary of common terms used in arithmetic, geometry, algebra, trigonometry, and statistics. It covers math concepts for kids in grade school through high school. Abacus: An early counting tool using sliding beads on wire or string used for basic arithmetic. Abscissa: x-coordinate in a Cartesian coordinate system or […]

# Mathematics

Have ever wondered how many zeros are in a million, billion, or trillion? Do you know how many zeros are in a vigintillion or a googol? Knowing how to write ordinary large numbers is useful for science or math class (or your bank account, if you are rich). Use your knowledge […]

## How Many Zeros in a Million, Billion, and Trillion?

Law of Cosines example problems showing how to derive the law and how to use it to find the lengths of the sides or angles of a triangle.

## Law of Cosines Example Problem

The law of sines is a useful rule showing a relationship between an angle of a triangle and the length of the side opposite of the angle. These two example problems show how to use this law to find angles and sides of a triangle.

## Law of Sines Example Problem

Algebra is the study of the rules behind why common mathematics works and operates. This Algebra Word Search consists of 30 elementary algebra glossary terms.

## Algebra Word Search

Who says math can't be fun? Try this fun geometry word search and find the 30 geometry glossary terms hidden in this puzzle.