So you are trying to tell me that a parallelogram is a rectangle in disguise? Wow! And I can use a similar formula of the area of a rectangle to find the area of a parallelogram? Wow! Ok, show me how! A=bh. So simple really.

Are you looking for the formula for the area of a sector of a circle? But what's a sector? A sector is just a fraction of the area of a circle. Follow the instructor as she illustrates and labels the different parts of a circle. She also...

There are basically two things you need to know to find the area of a circle. First, you need to use the correct formula. Second, you have to know the value of the radius. If you know these two things then all you have to do is plug the...

Inflation and higher fuel costs means airplane tickets will cost more to the consumer. So here is a word problem that presents a real-world situation. Figure out the total price for an airplane ticket that has increased by 30% from the...

Yes, it's a word problem, but you know the formula for distance, d=rt. The word problem here gives you two values so all you have to do is plug them into the correct place and solve. Don't forget to use the division property of equality...

Oh no, there is a missing angle in a quadrilateral. Where did it go? It didn't go anywhere, it's just missing the value of the angle. So how do you find that missing value? Use a formula of course. Everything in algebra uses a formula....

What's a trigonometric ratio? It is a ratio between two sides of a right triangle. In this problem, find sin(A) in the given right triangle. Use the ratio of the opposite side divided by the hypotenuse to find sin(A). The instructor...

You've been given two coordinate points on a graph. When these points are connected they form a line segment. Now you have to find the midpoint of this line. Of course there is a formula and all you have to do is plug in the coordinate...

The teacher uses a diagram to set up her initial equation to reflect the changes being made to a garden plot. She has a good explanation of how she got her equation. Then she works through the steps to solve the equation.

The quintessential word problem that makes everyone scream and run away. But wait, come back! Time, distance, when will they get there? You are really only working with one formula: distance= rate times time. You can do this. View this...

Slope? Does that mean the angle of the line on the graph? Yes, but it's not referred to as an angle on the graph. The slope of the line means how much does the line move up or down in comparison as to how much it moves left or right. So,...

Show your class what the point-slope form or a linear equation looks like and how to find it with this video. An instructor defines point-slope form and proceeds to work through an example. Great for in-class or at-home use.

There are a lot of steps in this problem. But just like walking up a flight of stairs, you should take one step at a time, so too in the solving of this problem. The instructor explains each step and what to do to move to the next one.

Length times width times height. Yes, the formula for the volume of a rectangular shape. But the values are monomials. Use the knowledge you have to multiply the monomials and then write it in simplest form.

Show your class what the point-slope form or a linear equation looks like and how to find it with this video. An instructor defines point-slope form and proceeds to work through an example. Great for in-class or at-home use.

The instructor uses a graph representing time and distance to illustrate how to solve this word problem. She explains each step: rate of change, distance, time, vertical change over horizontal change, change in distance, and change in...

A biologist must be able to work with and understand a variety of mixtures. In the following video David Caprette, PhD, describes types of mixtures, and their properties, that might be encountered in a biological laboratory, and...

In this video David Caprette, PhD, discusses the types and properties of mixtures prepared and/or encountered in a biological laboratory. He also introduces basic lab equipment, terms and concepts related to formulas, and the concept of...

Video tutorial presents different ways of representing a molecule and gives examples to demonstrate the difference between empirical, structural, and molecular formulas. [6:49]

This QuickTime movie explains how to find the area of a rectangle by using Pick's formula and then demonstrates this by showing how to use that area formula. As you watch and listen to the teacher and student interact it helps clarify...

This QuickTime movie provides an opportunity to use the order of operations in a word problem and find the solution. As you watch and listen to the teacher and students interact it helps clarify the thinking behind applying this concept.

Video tutorial teaches students about Empirical and Molecular formulas in Chemistry. [7:57]

Find out how to write a balanced chemical equation in this narrated tutorial. [4:57]

This QuickTime movie provides an opportunity to apply the order of operations to a word problem. As you watch and listen to the teacher and students interact it helps clarify the thinking behind applying this concept.