Khan Academy: Intro to Angles (Old)

Sal introduces the angle-bisector theorem and proves it.

An instructional video describing complex conjugates. Complex conjugates are defined and then used to simplify a problem in which a complex number is divided by another complex number. [8:03]

An introduction to strategies for implementing programming for a particle system. The focus is to keep track of a system of many elements. A sequence of the movie, Star Trek II: Wrath of Khan is used to illustrate particle system which...

Explains what a zero matrix is, shows examples, and provides some interactive practice exercises. Help is available for exercises if it is needed. A summary chart compares the number zero to the zero matrix.

Learn how to add or subtract two rational expressions into a single expression.

In daily language, we all use the word curve to mean 'not straight' but does the word curve have the same meaning in math? Can a straight line be a curve? Also, what makes a curve a 'simple curve'?

Learn what it means for polynomials to be factors of other polynomials or to be divisible by them.

An introduction to the most basic building block for programming motion--the vector. In JavaScript referring to a Euclidean vector defined as an entity that has both magnitude and direction.

An introduction to creating a single player version of the memory game using drawing commands and implementing the rules of the game using variables and logic.

Learn about arcsine, arccosine, and arctangent, and how they can be used to solve for a missing angle in right triangles.