Brian McLogan
How to solve a simple proportion
👉 Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal. Thus, proportion problems are problems involving the equality of two ratios. When given a proportion problem with an unknown, we...
Global Health with Greg Martin
Sensitivity and specificity - explained in 3 minutes
Dr Greg Martin talks about the sensitivity and specificity of diagnostic tools used in global health programs. This forms part of the epidemiology series.
Brian McLogan
Solving a rational equation as a proportion
👉 Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal. Thus, proportion problems are problems involving the equality of two ratios. When given a proportion problem with an unknown, we...
Curated Video
Determining Similarity of Figures Using Dilations and Scale Factors
This video explains how to determine if two figures are similar using dilations and scale factors. It reviews the concept of similar figures, which have the same shape but different sizes and corresponding congruent angles. The video...
NASA
NASA | Counting Craters on the Moon
Using the Lunar Reconnaissance Orbiter's Lunar Orbiter Laser Altimeter (LOLA), NASA scientists have created the first-ever comprehensive catalog of large craters on the moon. In this animation, lunar craters larger than 20km in diameter...
Brian McLogan
How congruent triangles compare to similar triangles
👉 Learn how to solve with similar triangles. Two triangles are said to be similar if the corresponding angles are congruent (equal). Note that two triangles are similar does not imply that the length of the sides are equal but the sides...
Brian McLogan
Solving a proportion by cross multiplication and inverse operations
👉 Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal. Thus, proportion problems are problems involving the equality of two ratios. When given a proportion problem with an unknown, we...
Curated Video
Percent Proportion: Finding Parts, Holes, and Percents
This video lesson will provide instruction on how to write and solve a percent proportion to find percents, parts or wholes. Proportional relationships will be reviewed, explained and connected to percents to solve multistep percent...
Tarver Academy
7-4 Applying Properties of Similar Triangles - GEOMETRY
In This Episode, Tyler Teaches Us About Applying Properties of Similar Triangles - Geometry
Curated Video
Finding the Original Amount and Amount of Change Using Proportions and Equations
In this video, the teacher explains how to find the original amount and the amount of change given the percent of change in the final amount. Using proportions and equations, the teacher demonstrates how to calculate the price of an item...
Curated Video
How to Find Percent Using a Proportion
In this short video we will answer a standardized math multiple choice question where we will use a proportion to find percent. We will begin by understanding the real world problem and that we can use a proportion to identify the...
Curated Video
Solve a Real World Unit Rate Problem
In this short video we will answer a standardized math test question where we are asked to us unit rate to solve a real world problem. We will begin by identify the unit rate given in the problem. We will write a proportion and use cross...
de Dicto
Time Perception with Dr Devin Terhune: Psychophysical experiments
Learn what insights were gained from psychophysical experiments. What is ecological validity and why is it important? Time Perception with Dr Devin Terhune, Part 2
Brian McLogan
Proving two triangles are similar two different ways
👉 Learn how to solve for the unknown in a triangle divided internally such that the division is parallel to one of the sides of the triangle. The triangle proportionality theorem states that if a line is parallel to one side of a...
Brian McLogan
What is an extended ratio
👉 Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal. Thus, proportion problems are problems involving the equality of two ratios. When given a proportion problem with an unknown, we...
Curated Video
GCSE Secondary Maths Age 13-17 - Ratio, Proportion & Rates of Change: Direct and Inverse Proportion - Explained
SchoolOnline's Secondary Maths videos are brilliant, bite-size tutorial videos delivered by examiners. Ideal for ages 13-17, they cover every key topic and sub topic covered in GCSE Maths in clear and easy to follow steps. This video...
Brian McLogan
How to determine if two ratios create a proportion
👉 Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal. Thus, proportion problems are problems involving the equality of two ratios. When given a proportion problem with an unknown, we...
Curated Video
Graphing Proportional Relationships Using a Table
This video explains how to graph a proportional relationship using a table. Understand the concept of proportions and learn how to plot points on a coordinate plane. The lesson also includes a real-life example of calculating earnings...
Brian McLogan
How to use proportions and direct variation to solve for x
👉 Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal. Thus, proportion problems are problems involving the equality of two ratios. When given a proportion problem with an unknown, we...
Brian McLogan
What is the similarity of triangles for SSS
👉 Learn how to solve with similar triangles. Two triangles are said to be similar if the corresponding angles are congruent (equal). Note that two triangles are similar does not imply that the length of the sides are equal but the sides...
Brian McLogan
Using proportions to solve a word problem with currency
👉 In this video, you will learn how to solve a word problem using proportions. To do this we will identify our unknowns as well as our ratio of terms. We will then proceed to set up a proportion and solve it.
Curated Video
Calculating Actual Lengths from Scale Drawings Using Ratios and Proportions
In this video, the teacher explains how to calculate the measurements for a scale model of the Parthenon using ratios and proportions. The lesson covers the concepts of ratios, proportions, corresponding sides in similar triangles, and...
Brian McLogan
Solving a proportion with a binomial
👉 Learn how to solve proportions. Two ratios are said to be proportional when the two ratios are equal. Thus, proportion problems are problems involving the equality of two ratios. When given a proportion problem with an unknown, we...
Brian McLogan
Percent of change
👉 Learn how to solve problems using percents. When solving problems with percents we will either convert the percents to decimal form or use proportions to solve. We will look to solve for the percent of change, the original price,...