Krista King Math
Volume of Cylinders
The world is full of cylinders — you just have to spot them! A video teaches learners how to calculate the volume of a right cylinder. The instructor introduces and discusses the elements of the formula for the volume of the...
Krista King Math
Surface Area of Prisms
Create a solid understanding of the concept of surface area. Building from the previous lesson in the series, the instructor demonstrates how to apply a formula to find the surface area of a rectangular prism. Examples use the formula to...
Krista King Math
Area of a Triangle
Triangles are not all created the same. The instructor shows how to find the area of different types of triangles using the formula. She also includes an example requiring coordinate geometry.
Krista King Math
Area of Parallelograms
Ensure a solid understanding of the components of a parallelogram. The instructor highlights the key concepts when determining the area of a parallelogram. He presents the formula used for parallelograms as images and as...
DoodleScience
Momentum
If you hit an object in the road when you're traveling at 60 mph, will it slow you down? Use the concept of momentum to explore this question. Make momentum calculations and predictions for velocity after collisions.
DoodleScience
Work Done and Power
He did the same amount of work, but somehow the result is more powerful! Show learners the difference between work and power and how the calculations relate to moving a box.
TED-Ed
Can You Solve the Bridge Riddle?
The zombies are charging and it is your job to get your party safely across the bridge. Are you up for the challenge?
TED-Ed
The Time Value of Money
Your car-loving or money-loving learners will enjoy this quick video on the time value of money (interest) presented in two scenarios about investing a bonus check to increase its future value in order to buy a favorite car. The formula...
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....
Curated OER
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.
Curated OER
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.
Curated OER
What is the Formula for the Volume of a Sphere?
The formula of a sphere is related to the formula of a cylinder? How? Oh, radius and pi. Watch this video and observe how the instructor illustrates just how these two formulas are connected. Then plug in the known values and solve this...
Curated OER
How Do You Find the Lateral and Surface Areas of a Cone?
The lateral surface area of a cone. Hmmm, what does that mean? Oh, it means the part you see if the cone was sitting on a flat surface, so it does not include the base. But if you want to include the base then it would be finding the...
Curated OER
How Do You Find the Area of a Triangle?
The formula for the area of a triangle is: area equals one half the base times the height. If you have been given these two values then all you need to do is plug them into the formula and solve. Don't forget to write the correct ending...
Curated OER
How Do You Find the Nth Term in an Arithmetic Sequence?
To find the 20th term in an arithmetic sequence, use the secret formula. What secret formula? It's: a sub n equals a sub one plus parentheses n minus one close parentheses times d. Got that? No? The watch this video to learn about the...
Curated OER
How Do You Write an Equation of a Line in Point-Slope Form If You Have the Slope and One Point?
Given the coordinates for a point on a line and given the slope of that line, write an equation in point-slope form. Really, all that needs to be done is to use the formula for point-slope form and plug in the values.
Curated OER
How Do You Solve a Word Problem with Exponential Decay?
The instructor first identifies what formula to use to solve this word problem. Then she explains what each of the variables stands for and helps match up their given values in this word problem. There are many components to solving this...
Curated OER
What's the Midpoint of Two Points on a Number Line?
There are two given values on a number line, what is the midpoint? Here's another formula. Identify the two given points, add them together, and then divide by two and that's the solution. Need proof? Then watch this video as the teacher...
Curated OER
What Is the Distance Formula?
Find the distance between two points on a coordinate plane. How is that done? Let's take a look at the distance formula. What's the distance formula? Well, it's a form of the Pythagorean Theorem. How? Watch the instructor diagram and...
Curated OER
How Do You Find the Axis of Symmetry for a Quadratic Function?
Short and simple. X equals negative b divided by two(a) is the formula used to find the axis of symmetry. If the quadratic equation is in standard form, identify the values for a, b, and c and plug the values into the formula. Do the...
Curated OER
How Do You Write an Equation of a Line in Slope-Intercept Form If You Have the Slope and the Y-Intercept?
If you are given the value for slope (m), and the value for the intercept (b), all you need to do is remember what the slope-intercept form looks like. Y=mx+b. Then you just have to plug the given values into the slope-intercept line of...
Curated OER
How Do You Write an Equation of a Line in Point-Slope Form If You Have Two Points?
Given two points on a line, write an equation in point-slope form. But what's the slope? Oh, you have to figure out the slope first. That can be done given two points. Just use the rise over run slope formula. This isn't so hard after...
Curated OER
What's the Direct Variation or Direct Proportionality Formula?
Direct variation? Constant of variation? Constant of proportionality? Two variables related? If one variable changes what happens to the other variable? What do all these terms have to do with each other? Watch this video as the...
Curated OER
What is a Literal Equation?
Have you ever heard of a literal equation? You might already know of a few! As this video explains, literal equations have multiple variables that often represent known values. Watch the video to learn more!