This lesson may be useful to both persons with prior knowledge of complex numbers and those without. The lesson begins with the definition of complex numbers and its notation, then gives the rules of arithmetic for them with exercises....

Find a quick, concise explanation of the Angle Sum Theorem. A step by step explanation of the proof is included to help you understand the theorem.

In this activity, students will gain an understanding of the Pythagorean theorem and will recognize the variety of ways in which theorems can be proved algebraically, geometrically and visually.

The University of Saskatchewan offers this resource for the review of mathematical concepts that students need to enter university level math courses. Topics include mental arithmetic, algebra, geometry, trigonometry, exponential and...

This fantastic resource addresses many aspects of series and convergence. Uses interesting and helpful examples. Provides the option to follow links to proofs and answers to exercises. Also discusses Zeno's paradox of Achilles and the...

This tutorial provides a definition and examples of a "magic square" and then shows a proof and generalizations.

Using algebra, learn how to do fast math in your head!

In a coordinate proof, geometric statements using algebra and the coordinate plane.

This section explores the process for finding inverses of functions, and then proving the function and its inverse algebraically. Additionally, it explores how the graphs of functions and their inverses compare to each other, and it...

This resource discusses the relationship between '0.999' and '1' and provides various proofs of their equality.

[Free Registration/Login Required] Students prove interesting numerical patterns by applying their number sense.

Explore and discover the Pythagorean theorem.

A comprehensive guide for learning all about mathematical induction with definitions, how to prove this formula, solved examples, and practice questions.

This question is answered by discussing and comparing rational and irrational numbers. For more advanced levels of Algebra, there are sections that discuss different lemmas of rational numbers and give their proofs.

This standards-based NCTM website offers resources for teachers of mathematics for all grade levels, including interactive math tools, lesson plans, online resources, and the like.

An interesting small-group activity that will engage students in problem solving, reasoning, and communicating their mathematical thoughts with eachother. The materials needed for the project and the steps the teacher should assist the...