Mathematics

Learn about topics and get worked problems in all areas of math, including arithmetic, algebra, geometry, calculus, probability, statistics, and trigonometry.

Statistics Bar Graph
The term “average” is not used in statistics. Instead, statisticians choose the terms mean, median and mode to express an “average” for numeric data. Mean, Median, Mode, and Range Definitions First, let’s review what these terms mean: Mean: Usually, “average” is the mean. The mean is the average of a […]

How to Calculate Mean, Median and Mode

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Mathematics is a rigorous discipline with defined terms and rules. Too bad the same is not true of mathematicians. Here are a few of my favorite math jokes and puns. Post your favorite in the comments section. Start with the first you probably ever heard…Q. Why was 6 afraid of […]

Math Jokes

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Trig Identities
This study sheet has ten groups of trig identities for the basic trigonometry functions. These identities include the reciprocal and co-function relationships between trig functions. There are also half-angle and double angle identities, along with sum and product relationships. This table is an extremely useful thing to keep on hand […]

Trig Identities Study Sheet

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45-45-90 Right Triangle 1
Right triangles are central to trigonometry. Two special right triangles appear over and over in standardized exams and homework problems. These triangles are “special” because they have simple ratios between the lengths of each side. The first is the 30-60-90 triangle. The 30-60-90 is named after the interior angles of […]

Special Right Triangles

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