Curated OER
How Do You Solve a Problem Using Indirect Measurement with Shadows?
Using indirect measurement, this video shows viewers how to find the height of a flagpole. The lecturer employs drawings as well as proportions to solve this problem, explaining each step. A useful resource to aid struggling learners and...
Curated OER
How Do You Solve a Problem Using Indirect Measurement with Shadows?
Using indirect measurement, this video shows viewers how to find the height of a flagpole. The lecturer employs drawings as well as proportions to solve this problem, explaining each step. A useful resource to aid struggling learners and...
Curated OER
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...
Curated OER
What are Similar Figures?
Similar figures have the same shape, the same corresponding angles, but different lengths of their corresponding sides. The teacher explains just what all that means. She demonstrates how to compare the two shapes to prove they are similar.
Curated OER
How Do You Find Missing Measurements of Similar Figures Using a Scale Factor?
Similar figures have corresponding sides and corresponding angles. With this in mind, missing values can be found by using a scale factor. Not sure how to do that? Watch this video as the instructor illustrates how to set up the known...
Curated OER
How Do You Identify Corresponding Parts in Congruent Triangles?
Congruent, corresponding, congruent corresponding. If two figures are congruent, then their corresponding sides and corresponding angles are congruent. Is this to be believed? Watch this video and see if the proof is in the pudding.
Curated OER
How Do You Find Missing Measurements of Similar Figures Using a Proportion?
Two similar triangles have the same angles, but their legs have different lengths. This means their angles are congruent, and thusly, their corresponding sides are congruent. So there is a missing measurement that needs to be found. Set...
Curated OER
Proportions and Similar Figures
Duane demonstrates how to find a missing length in figures that are similar. In this example he uses two similar triangles.
Loyola University Chicago
Math Flix: Proportion Similar Figures
This QuickTime movie applies the concept of proportion to similar geometric figures. As you watch and listen to the teacher and students interact it helps clarify the thinking behind applying this concept. Allow loading time.
Sophia Learning
Sophia: In Group/out Group: Relationships and Attitudes: Lesson 3
At the end of this tutorial, the learner will understand ways in which group membership affects people's perceptions and actions towards their own and other groups. It is 3 of 3 in the series titled "In-Group/Out-Group: Relationships and...
Sophia Learning
Sophia: Scale Factors: Lesson 5
This lesson defines the phrase scale factor. It is 5 of 5 in the series titled "Scale Factors."
Sophia Learning
Sophia: Why and How Do Humans Group?: Lesson 3
At the end of this tutorial, the learner will understand causes and dynamics of group formation. It is 3 of 3 in the series titled "Why and How do Humans Group?."
Khan Academy
Khan Academy: Worked Examples: Geometry: Ca Geometry: Similar Triangles 1
In this video tutorial students explore a proof using similar triangles.
Khan Academy
Khan Academy: Triangles: Finding Area Using Similarity and Congruence
Explains how to determine the area of a pentagonal shaded region in a triangle. The triangle that is broken into multiple similar and congruent triangles.
Sophia Learning
Sophia: Similar Solids
Explore how objects can have the same shape but not the same size and how they are categorized as similar solids. Assess learning with a quiz.
Sophia Learning
Sophia: Surface Area and Volume in Similar Solids
Determine if solids are proportional by calculating the surface are and volume. Assess learning wih a quiz.
Sophia Learning
Sophia: Using Smiliarity to Identify Missing Information
Find unknown information about similar figures by using similar figures. Assess learning with a quiz.
Sophia Learning
Sophia: Triangle Proportionality Theorem: Lesson 3
This lesson presents how to apply the triangle proportionality theorem to solve for unknown variables and side lengths. It is 3 of 6 in the series titled "Triangle Proportionality Theorem."
Sophia Learning
Sophia: Scale Factor and Surface Area of Similar Figures: Lesson 4
This lesson will discuss the relationship between scale factor and surface area of similar figures. It is 4 of 4 in the series titled "Scale Factor and Surface Area of Similar Figures."
Virtual Nerd
Virtual Nerd: How Do You Figure Out if Two Figures Are Similar?
Follow along with this tutorial to see an example of how to determine if two given figures are similar. [7:49]
Sophia Learning
Sophia: Demonstrating Similarity
Different shapes are used to explore and define similarity. Assess learning with a quiz.
Imagine Learning Classroom
Learn Zillion: Prove Two Figures Are Similar After a Dilation
In this lesson, you will learn how to determine if two figures are similar by using dilations and scale factors. [5:23]
Khan Academy
Khan Academy: Similar Shapes & Transformations
This video lesson demonstrates how to determine whether given polygons are similar by trying to map one onto the other. The instructor uses angle-preserving transformations in this process.
Khan Academy
Khan Academy: Triangles: Pythagorean Theorem Proof Using Similarity
This video shows a proof for the Pythagorean Theorem by breaking a right triangle into two similar triangles and setting up ratios of corresponding sides.