Learn about the different types of triangles. See examples and understand how triangles are classified by length of sides and angles.
Mathematics
Get the definition of a tesseract or hypercube. Learn how to visualize a four-dimensional object and get tesseract facts.
What Is a Tesseract or Hypercube?
Learn how to calculate percent. Follow the step-by-step tutorial and see example math calculations.
How to Calculate Percent
Learn what scientific notation is and how to use it to write and perform calculations with very large and very small numbers.
Scientific Notation – Working With Exponents
The number π or pi is a mathematical constant that is the ratio of a circle’s circumference to its diameter (π = C/d). The ratio is a constant no matter what size of circle is used. Pi is also called Archimedes’ constant. Although pi is often approximated as 3.14159, its […]
Pi Facts – What Is the Number Pi?
Positive and negative numbers are two broad classes of numbers that are used in math and also everyday transactions, like managing money or measuring weight. A positive number has a value greater than zero. Its sign is positive, but it is usually written without a plus sign in front of […]
Rules for Positive and Negative Numbers
Look up unfamiliar definitions in this math dictionary for kids. It covers arithmetic, algebra, geometry, statistics, and trigonometry.
Math Dictionary for Kids
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.