The Meaning of Percentage: Comparing Percentages
This clip provides examples which illustrate the fact that, while percents "have no great mathematical importance, they're just very handy from a practical point of view."
The Meaning of Percentage: Decimals, Percents and Fractions
This clip explains that decimals can be changed to percents by moving the decimal point all the way to the far right and adding the percent sign. "Changing percent to decimals is just the reverse," the clip adds. "We dro..
The Meaning of Percentage: Percentage Provides An Easy Way to Compare Fractions
This clip explains that using percent to express values provides an easy means by which to compare fractions. The clip notes that, since there's a common denominator of 100, all that's needed to compare fractions express..
The Meaning of Percentage: Summary: The Meaning of Percentage
This clip summarizes the key points about percentage, stressing at the outset that it's practical to be able to view all fractions with the same denominator. The clip then talks about the different ways we can express th..
The Meaning of Percentage: Very Small Percentages
This clip explains how to deal with very small percents, such as those less than 1 percent. As an example, it uses one-fourth percent, which it states is one quarter of 1%. The clip then goes through the steps necessary ..
Triangles: Altitude in Triangles
This clip looks at a feature of isosceles triangles that has to do with altitude (or height). "The altitude is a perpendicular line segment from the base to the vertex of the opposite angle," the clip explains. "The alti..
Triangles: Closer Look at Isosceles Triangles, A
This clip focuses on isosceles triangles, explaining that the equal sides are called the legs, while the remaining side is called the base. The clip notes that the base angles have the same measure, adding that, "Â…this ..
Triangles: Introduction to Triangles
This clip talks about the ways in which triangles are used in various professions. It also introduces the different types of triangles (equilateral, scalene and isosceles).
Triangles: Pythagorean Theorem, The
This clip introduces the Pythagorean Theorem, named for the Greek mathematician Pythagoras. In addition to explaining the theorem itself, the clip explains how it is commonly used, including as a way to determine if a tr..
Triangles: Triangles: Practical Problems
This clip consists of several practical problems which the student can solve by applying the Pythagorean Theorem and other facts about triangles that have been discussed in previous clips.