Curated OER
What is the Formula for the Volume of a Prism?
Is prism just another mathematical term for a solid? It must be since this lesson is about volume. The teacher illustrates and explains how to find the volume of a rectangular prism and also how to find the volume of a triangular prism....
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How Do You Find the Slope of a Line If You Have a Perpendicular Line?
What kind of lines have slopes that are the opposite reciprocal of each other? Parallel lines? No. Parabolas? No. Perpendicular lines? Yes! Watch and listen as the instructor demonstrates how to make these determinations about...
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What is the Y-Coordinate?
How are ordered pairs, coordinate points, and graphing related to each other. What is the importance of the y-coordinate? Does it matter what order you write an ordered pair in? Yes! The y-coordinate is always written second. Always! And...
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How Do You Find a Solution Set When You Have A Replacement Set?
Given a replacement set of values, plug them in to find a solution set to this inequality expression.
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What's a Dividend and What's a Divisor?
Want to know what the dividend is in a division problem? It's the number being divided. Want to know what the divisor is in a division problem? It's the number the dividend is being divided by. The teacher shows three ways to write out a...
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How Do You Add Fractions with the Same Denominator?
Want to add fractions? Well, if they have the same denominator it's going to be so easy. Just add the numerator values together and keep the denominator the same. Easy as that.
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How Do You Use a Proportion to Find What Percent a Part is of a Whole?
Percent of a number? Learn how to set this problem up as a proportion to solve. It's not as hard as you think.
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How Do You Solve a Word Problem Using Inverse Variation?
Don't panic! There is a pretty simple straightforward formula to solve this problem. Some of the words are a bit overwhelming: indirect variation, inverse, constant of variation, indirect proportionality. But one simple formula and just...
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How Do You Solve an Inequality Using Subtraction?
Use the subtraction property of inequality to solve this problem. It's just a one-step solution and then the instructor shows how to write the answer in set builder notation.
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How Do You Solve a Two-Step Equation by Combining Like Terms?
Combine like terms before solving the equation. This should be a rule of thumb. The goal is to isolate the variable, so it stands to reason that if you have more than one of the same variable, you would combine them. See how the teacher...
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How Do You Find the Sine of an Angle in a Right Triangle?
A trigonometric ratio 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 over the hypotenuse.
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What is the Quotient Property of Square Roots?
Before defining the quotient property of square roots, the teacher in this video works through an example that shows how the property is possible. She then goes through a couple more examples of the property in action. Show this resource...
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What is the Product Property of Square Roots?
If your class has a grasp of square roots, but is having difficulty with the product property of square roots, this video might be for you! In the video, an instructor completes a short proof of the property, defines the property, and...
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What's a Perfect Square?
What makes an integer a perfect square? Want to know the answer? Do the numbers 4, 9, 16, 25, and 36 mean anything? Is the light bulb glowing bright? Yes, anytime you square an integer, the value is a perfect square. That makes sense!
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How Do You Simplify Radicals Using the Product Property?
It would be difficult to explain how to write the given radical , the square root of 60, in its simplest form. It's not a perfect square so there are several steps required to break it down and get it to its simplest form. Just watch...
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What are the Legs and Hypotenuse of a Right Triangle?
What are all the parts of a right triangle called? What makes it a right triangle? Legs? Triangles have legs? Hypotenuse? Pythagorean Theorem? The instructor diagrams and identifies all the parts of a right triangle for you.
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How Do You Find the Midpoint of Two Points on a Map If You Have the Coordinates?
So you need to find the midpoint between two cities on a map. If you know the coordinates of the two cities then you can use a formula to figure out the midpoint. It really is as easy as that. Check out this video to see the formula.
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How Do You Find a Scale Factor in Similar Figures?
Three angles of one triangle are equal to the corresponding angles in another triangle. Use a ratio of corresponding sides to find the scale factor. Actually, there are two scale factor values. The instructor will explain how to get both...
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How Do You Solve a Scale Model Problem Using a Scale Factor?
Scale drawings are used to represent many things. Scales are used all the time on maps, and in architectural drawings. Watch this video as the instructor illustrates a simple drawing of a blueprint to represent the footage of an actual...
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How Do You Find the Scale of a Model?
A model car, a life size car, now compare their sizes. Hmmm. Ok, set up a proportion and then figure out a ratio, and now you can express the relationship in terms of scale. Watch this video and the teacher will demonstrate just how to...
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How Do You Know If Two Ratios are Proportional by Reducing?
Working on proportional ratios in your class? This video might be for you! An instructor takes a step-by-step approach to reducing and comparing two ratios in order to determine if they are proportional. A clear video, this resource...
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What's a Ratio?
Fractions are ratios. What? Yes! A ratio is a comparison of numbers, and a fraction is a way to write a ratio. There are a couple of other ways to write a ratio. Do any come to mind? Can ratios be found in the real world? Yes!...
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What are Equivalent Ratios?
Work through a word problem with the help of a video tutor. You'll learn how equivalent ratios are just like equivalent fractions. Write a ratio as a fraction, reduce each ratio, then determine if they are the same. It's as simple as that!
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How Do You Use Dimensional Analysis to Convert Units on Both Parts of a Rate?
The video just before this lesson showed how to do unit analysis and rate conversions. This lesson also shows conversion of unit rates, feet, miles, seconds, hours. So pay attention and learn how to figure out how many feet per second...