Math Dictionary of Mathematics Definitions

Mathematics is the science of numbers as Aristotle defined. Here we have collected all the important mathematics definitions. Browse these definitions or use the Search function for a specific definition.

Math Definitions

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There are currently 2 definitions in this directory beginning with the letter R.
Radian
The angle made by taking the radius and wrapping it round the circle.

One Radian is (180/π) degrees, which is about 57.2958 degrees.

Ratio
A ratio shows the relative sizes of two or more values.

Ratios can be shown in different ways:
• using the ":" to separate example values
• using the "/" to separate one value from the total
• as a decimal, after dividing one value by the total
• as a percentage, after dividing one value by the total

Example: if there is 1 boy and 3 girls you could write the ratio as:

1:3 (for every one boy there are 3 girls)
1/4 are boys and 3/4 are girls
0.25 are boys (by dividing 1 by 4)
25% are boys (0.25 as a percentage)


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