A comprehensive guide for learning all about percentages with definitions, how to calculate them, solved examples, and practice questions.

The student will apply and prove the definition of similar triangles and identify and apply the relationships that exist when an altitude is drawn to the hypotenuse of a right triangle, including the geometric mean.

This site gives a definition of what a rational number is. Gives examples and formulas. Very helpful.

The definitions of the six trig ratios are presented here, along with several examples of how to determine the ratios given 2 or more sides of a right triangle.

[Free Registration/Login Required] Students learn how to balance and interpret chemical equations and cover the law of definite proportions and mole ratios. Done in an engaging fashion. Assessment is paper written.

Learn the definition of radians and how to calculate trig ratios using radian measures. Examples are provided showing how to convert from degrees to radians.

From the Cambridge Engineering Selector web site. Contains a lengthy list of definitions of a variety of material properties related to solid strength and elasticity (and more). Definitions are accompanied by equations and metric unit...

Learn about rational numbers with this helpful reference tool. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.

The discussion examines direct variation. Students learn about the math concept through definitions and sample exercises.

Gain an understanding of the golden rectangle with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

After learning about cyclones and anticyclones, and relating this to the Great Red Spot on the surface of Jupiter, students create a model of the Red Spot and use ratios to determine its size. A vocabulary list with definitions is included.

At its core, the LEGO MINDSTORMS product provides a programmable microprocessor. Students use the EV3 processor to simulate an experiment involving thousands of uniformly random points placed within a unit square. Using the underlying...

The U.S. Census Bureau offers the official statistics on poverty.

A basic definition for what the Golden Mean (Golden Ratio) is and how to find its reciprocal.

Students review the definition of rational numbers as ratios and as terminating and repeating decimals. They also examine the reciprocal property of rational numbers and operations with rational numbers.

Concepts in Trigonometry are explained and illustrated here by a member of the math department at Borough of Manhattan Community College.

A thorough review of calculus series. Links direct the student to the basic properties of series, as well as to explanations and examples of convergence tests in series. The expansions for exponential, logarithmic, and root functions and...