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Similar Triangles, Similarity, Geometry Instructional VideoSimilar Triangles, Similarity, Geometry Instructional Video
Publisher
Khan Academy
Resource Details
Curator Rating
Educator Rating
Not yet Rated
Grade
9th - 10th
Subjects
Math
1 more...
Resource Type
Instructional Videos
Media Length
9:34
Audiences
For Teacher Use
1 more...
Duration
10 mins
Instructional Strategies
Flipped Classroom
1 more...
Accessibility
Closed Captions
1 more...
Year
2007
Usage Permissions
Creative Commons
BY-NC-SA: 3.0
cc
Instructional Video

Similar Triangles, Similarity, Geometry

Curated and Reviewed by Lesson Planet

Although a rather complicated topic, this video clearly explains the concept of solving problems involving similar triangles. It employs problem-solving to determine whether two figures are similar triangles. In addition, it provides guidance for finding the angles Õ values. Tip: The presentation finishes prior to solving the final problem. Furthermore, this is the first part of a series on similar triangles.

37 Views 26 Downloads

Concepts

proportions, ratios, similar figures, similarity, similar triangles

Additional Tags

similar triangles, similar figures, ratios, proportions, math

Classroom Considerations

  • This video is hosted on YouTube

See similar resources:

Lesson Plan

Similar Triangles

Illustrative Mathematics
Proving triangles are similar is often an exercise in applying one of the many theorems young geometers memorize, like the AA similarity criteria. But proving that the criteria themselves are valid from basic principles is a great...
9th - 11th Math
CCSS: Designed
Worksheet

Similar Triangles and Trapezoids, and Circles

Curated OER
High schoolers answer two problems involving area of shaded regions. Students then answers six questions involving perimeter, area, and circumferences. The remaining two questions involve ratios of similar figures.
9th - 12th Math
PPT

Solving Systems of Linear Inequalities

BW Walch
One thing that puzzles a lot of young algebrists is the factors in a word problem that are taken as "understood". This presentation on solving systems of linear inequalities does a great job walking the learner through how to tease those...
9th - 10th Math
CCSS: Adaptable
Instructional Video

Similar Triangles (Part 2), Similarity, Geometry

Khan Academy
Building on concepts in the first part of the series on similar triangles, installment number two explores how to find the values for given angles in a triangle. These problems are solved by using algebra and ratios. A step-by-step...
10 mins 9th - 10th Math
Lesson Plan

Identifying Similar Triangles

Mathematics Assessment Project
Math whizzes work with angle sums and exterior angles to figure out the measure of other angles. This particular publication provides comprehensive support in the form of an anticipatory activity, questions designed to prompt discussion,...
7th - 9th Math
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Lesson Plan

Problem Solving

Willow Tree
School subjects connect when your young scholars use math to edit English. Math allows you to convert an entire paragraph into a simple equation or inequality. Examples encourage learners to write expressions, equations, and inequalities...
8th - 11th Math
CCSS: Adaptable
Instructional Video

Khan Academy: Similar Triangle Example Problems

Khan Academy
Demonstrates how to determine if triangles are similar based on AA, SSS, or SAS similarity postulates. Five different pairs of triangles are compared. [9:23]
9th - 10th Math
CCSS: Adaptable
Instructional Video

How Do You Solve a Problem Using Indirect Measurement with Shadows?

Curated OER
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...
5 mins 6th - 12th Math
Interactive

Pythagorean Theorem for Solving Right Triangles: Solving the Triangle

CK-12 Foundation
Observe the change in the trigonometric ratios as angles vary. An interactive provides the values of trigonometric ratios for both acute angles in a right triangle. Pupils create a right triangle to match given criteria and find the...
9th - 12th Math
CCSS: Adaptable
Lesson Plan

Triangle Area

Shodor Education Foundation
While the lesson focuses on right triangles, this activity offers a great way to practice the area of all triangles through an interactive webpage. The activity begins with the class taking a square paper and cutting in in half; can they...
6th - 9th Math
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