Similarity Videos - Free Educational Videos for Students in K - 12

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This page provides a list of educational videos related to Similarity. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Similarity.


Geometry - Unit 5 Lesson 5 Similarity Transformations


By rwalsh213

Geometry - Unit 5 Lesson 5 Similarity Transformations

Geometry: 7-6 Dilations and Similarity in the Coordinate Plane


By Sir Tyler Tarver

How to apply similarity properties in the coordinate plane and use a coordinate proof to prove figures similar. Yeah yeah.

Similarity postulates | Similarity | Geometry | Khan Academy


By Khan Academy

Thinking about what we need to know whether two triangles are similar

Similar triangle example problems | Similarity | Geometry | Khan Academy


By Khan Academy

Multiple examples looking for similarity of triangles. All Khan Academy content is available for free at www.khanacademy.org

Finding area using similarity and congruence | Similarity | Geometry | Khan Academy


By Khan Academy

Example of using similarity and congruence to find the area of a triangle

Similar triangles 1


By Khan Academy

Sal reviews all the different ways we can determine that two triangles are similar. This is similar to the congruence criteria, only for similarity!

Similar triangles 2


By Khan Academy

Sal reviews all the different ways we can determine that two triangles are similar. This is similar to the congruence criteria, only for similarity!

Recovering the Sequence of Transformations to Show Congruence or Similarity


By James Olsen

Directions: Two figures will be given. Determine if they are congruent or similar. Then state the sequence of transformations that exhibits the congruence or similarity. There is an error in this video!! In example 3, the first translation should be using vector BF (and not vector AF). This is aligned with the following Common Core State Standards for Mathematics: [8.G.2] Understand that a two-dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and translations; given two congruent figures, describe a sequence that exhibits the congruence between them. [8.G.4] Understand that a two-dimensional figure is similar to another if the second can be obtained from the first by a sequence of rotations, reflections, translations, and dilations; given two similar two- dimensional figures, describe a sequence that exhibits the similarity between them. [G.CO.5] Given a geometric figure and a rotation, reflection, or translation, draw the transformed figure using, e.g., graph paper, tracing paper, or geometry software. Specify a sequence of transformations that will carry a given figure onto another. [G.SRT.2] Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar

Similar triangle basics | Similarity | Geometry | Khan Academy


By Khan Academy

Triangles are similar when all three of the corresponding angles are the same and the sides are simply "scaled-up" or "scaled-down" versions of each other.

Similar triangles 2


By Khan Academy

Multiple examples where Sal analyzes the similarity of triangles.

Proving Triangles are Similar - YourTeacher.com - Geometry Help


By yourteachermathhelp

Students learn the following theorems related to similar triangles. If an angle of one triangle is congruent to an angle of another triangle, and the lengths of the sides that include each angle are in proportion, then the triangles are similar (Side-Angle-Side Similarity Theorem, or SAS Similarity Theorem). If the lengths of the sides of two triangles are in proportion, then the triangles are similar (Side-Side-Side Similarity Theorem, or SSS Similarity Theorem). Students are then asked to determine whether given triangles are similar based on these theorems.

Triangle Similarity - AA SSS SAS & AAA Postulates, Proving Similar Triangles, Two Column Proofs


By The Organic Chemistry Tutor

This geometry video tutorial provides a basic introduction into triangle similarity. it explains how to use two column proofs in order to prove if two triangles are similar using the mostly the AA postulates. Other triangle similarity postulates mentioned are the AAA, SSS, and SAS postulates. Theorems used in this video include the base angle theorem, theorems associated with parallel lines, alternate interior angle theorem, vertical angles, reflexive property, definition of an altitude, right angle congruence, and more. This geometry video contains plenty of examples and practice problems on triangle similarity.

Solving Similar Triangles and Proportions


By MrCaryMath

YouTube presents Solving Similar Triangles and Proportions, an educational video resource on math.

Similar Triangles - MathHelp.com - Geometry Help


By yourteachermathhelp

In this video, students will review the idea that the ratios of the lengths of corresponding sides of similar figures are equal. Students are shown how to use this idea to find missing segment lengths in similar figures.

How to Apply Postulate 13 to Similar Triangles


By Khan Academy

Video uses an electronic black board with different colored pens. This video is an introduction to similar triangles. The person discusses the meaning of the term similar then goes on to discuss similar triangles (they have all the same angles), and why they are considered similar (ratio of corresponding sides is the same). Video then gives examples to help students understand the terms used and how to find similar angles. Good quality video. Good for middle elementary and middle school students.

How to Apply Postulate 13 to Similar Triangles


By Khan Academy

Video uses an electronic black board with different colored pens. This video is an introduction to similar triangles. The person discusses the meaning of the term similar then goes on to discuss similar triangles (they have all the same angles), and why they are considered similar (ratio of corresponding sides is the same). Video then gives examples to help students understand the terms used and how to find similar angles. Good quality video. Good for middle elementary and middle school students.

Proof of Pythagorean Theorem using similar triangles


By Matt Stryker

Proof of Pythagorean Theorem using similar triangles

Pythagorean theorem proof using similarity | Geometry | Khan Academy


By Khan Academy

Watch this video to see a proof of the Pythagorean Theorem that uses properties of similar triangles. Remember, similar triangles have congruent angles (equal angles) and proportional corresponding sides.

Solving similar triangles 2


By Khan Academy

Sal solves two problems where a missing side length is found by proving that triangles are similar and using this to find the measure.