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### Names of Geometric Shapes—With Pictures

Comprehensive illustrated list of names for both flat shapes and solid shapes. Geometry reference for elementary and middle school, as well as home school. Over 60 pictures of geometric shapes.

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### Practical Applications of Mathematics in Everyday Life

The uses of math for the layperson are essentially endless. No matter whether you are a struggling student, a homeowner, or someone simply trying to lose weight, math is the universal language that has an something to...

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### Volume of a Trapezoidal Prism: Formula and Examples

Formulas for the volume of a trapezoidal pyramid as well as several example problems to solve, with solutions.

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### How to Integrate sin(x)/x and cos(x)/x

Two simple functions, sin(x)/x and cos(x)/x, can't be integrated the easy way. Here is how it's done.

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### How Much Is Seventy Percent Off? (Calculating Percentages in Your Head)

How do you learn to calculate percentages in your head? Practice, practice, practice. Seriously, doing mental math in your head isn't that hard when you understand a few shortcuts. Here's our tips.

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### Should You Play Powerball or Mega Millions? Probability & Expected Return

This article has been recently edited to reflect the most recent changes in both lotteries' structures. Powerball and Mega Millions are the two largest lotteries in the US in terms of the number of players, revenue...

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### List of Functions Without Antiderivatives

List of non-integrable functions in calculus, functions with no closed-form antiderivatives, i.e., cannot be expressed as elementary functions.

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### 7 Hard Trig Problems—Can You Solve These Challenging Geometry Problems?

Trigonometry is an area of geometry that deals with lengths and angles of triangles. And since many two-dimensional figures and three-dimensional sold shapes can be broken down into triangles, trigonometry is also used...

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### How to Calculate the Number of M&M's in a Container

Ever wondered how many M&M's can fit in a container?

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### Formula for the Arc Length of a Helix

helix length formula and examples, length of string wrapped around a tube, length of wire coiled around a cylinder,...