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Angle Angle AA Triangle Similarity Activity | Similar Triangles | AAA
Angle Angle AA Triangle Similarity Activity | Similar Triangles | AAA
Angle Angle AA Triangle Similarity Activity | Similar Triangles | AAA
Angle Angle AA Triangle Similarity Activity | Similar Triangles | AAA
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Description

This geometry word problem can be used after investigating the "Angle Angle Triangle Similarity Postulate," as an application task. Some textbooks may refer to it as the AAA or Angle Angle Angle Triangle Similarity Theorem. Alternatively, it can be used as a guiding task, in which students attempt it and perhaps get perturbed. This can lead to an investigation of the Angle Angle Triangle Similarity Postulate.

Students come to understand that when two angles of one triangle are congruent to two corresponding angles of another triangle, then the corresponding side lengths are proportional. Thus, the triangles are similar. Then after the investigation, you can return to this task with your students since they will have the skills necessary to complete it.

Go deeper than congruent triangles and develop the concept of similar triangles and proportionality with your students.

Perfect for using on Google Classroom, Pair Deck, and/or other digital platforms.

* Check out other Geometry Products by Mr. Conceptual Understanding *

>> Similar Triangles Digital Exploration | Geometry Word Problem Distance Learning

>> 5th Grade Geom: Classifying Quadrilaterals ** Card Sort ** Distance Learning

>> Area of a Triangle - Google Slides - Distance Learning

>> Guess Who Style Vocab: Line, Ray/Angle/Parallel/Perpendicular *Distance Learning

>> Surface Area of Rectangular Prisms - Interactive Desmos - Distance Learning

>> Exploring Area of Rectangles - Conceptually ** Distance Learning **

>> Pythagorean Theorem, Application & Distance Formula - Distance Learning

>> Converse of the Pythagorean Theorem - Distance Learning

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LICENSING TERMS When buying this product, you agree that you own a license for one teacher only and that it is for your individual use in your classroom only. Licenses are non-transferable, which means they cannot be passed from one teacher to another. No part of this resource is to be shared with colleagues or used by an entire department, grade level, school or district without purchasing the correct number of licenses. If you are a coach, principal, administrator, or district interested in transferable licenses to accommodate yearly staff changes, please email me at brettpatrick5@gmail.com.

COPYRIGHT TERMS: You may not upload this product, or any part of this product, to the Internet in any capacity, including classroom websites, personal websites, or network drives, unless the site is password-protected and can only be accessed by students.


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Angle Angle AA Triangle Similarity Activity | Similar Triangles | AAA

Rated 4.75 out of 5, based on 4 reviews
4.8 (4 ratings)
Mr Conceptual Understanding
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Highlights

Digital downloads
Grades icon
Grades
8th - 10th
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Standards

Description

This geometry word problem can be used after investigating the "Angle Angle Triangle Similarity Postulate," as an application task. Some textbooks may refer to it as the AAA or Angle Angle Angle Triangle Similarity Theorem. Alternatively, it can be used as a guiding task, in which students attempt it and perhaps get perturbed. This can lead to an investigation of the Angle Angle Triangle Similarity Postulate.

Students come to understand that when two angles of one triangle are congruent to two corresponding angles of another triangle, then the corresponding side lengths are proportional. Thus, the triangles are similar. Then after the investigation, you can return to this task with your students since they will have the skills necessary to complete it.

Go deeper than congruent triangles and develop the concept of similar triangles and proportionality with your students.

Perfect for using on Google Classroom, Pair Deck, and/or other digital platforms.

* Check out other Geometry Products by Mr. Conceptual Understanding *

>> Similar Triangles Digital Exploration | Geometry Word Problem Distance Learning

>> 5th Grade Geom: Classifying Quadrilaterals ** Card Sort ** Distance Learning

>> Area of a Triangle - Google Slides - Distance Learning

>> Guess Who Style Vocab: Line, Ray/Angle/Parallel/Perpendicular *Distance Learning

>> Surface Area of Rectangular Prisms - Interactive Desmos - Distance Learning

>> Exploring Area of Rectangles - Conceptually ** Distance Learning **

>> Pythagorean Theorem, Application & Distance Formula - Distance Learning

>> Converse of the Pythagorean Theorem - Distance Learning

************************************************************************************************

Follow me for updates!

LICENSING TERMS When buying this product, you agree that you own a license for one teacher only and that it is for your individual use in your classroom only. Licenses are non-transferable, which means they cannot be passed from one teacher to another. No part of this resource is to be shared with colleagues or used by an entire department, grade level, school or district without purchasing the correct number of licenses. If you are a coach, principal, administrator, or district interested in transferable licenses to accommodate yearly staff changes, please email me at brettpatrick5@gmail.com.

COPYRIGHT TERMS: You may not upload this product, or any part of this product, to the Internet in any capacity, including classroom websites, personal websites, or network drives, unless the site is password-protected and can only be accessed by students.


Report this resource to TPT
Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT's content guidelines.

Reviews

4.8
Rated 4.75 out of 5, based on 4 reviews
4
ratings
All verified TPT purchases
Great Resource!
Rated 5 out of 5
June 30, 2026
Thanks for providing such a helpful resource for me and my students.
Elyce S.
2,697 reviews • Virginia
Grades taught: 8th
Good Resource
Rated 5 out of 5
March 24, 2026
My students enjoyed working on this and seeing how the concepts were could be used in real life.
Kelly Ridgway
(TPT Seller)
169 reviews • Oklahoma
Grades taught: 9th, 10th, 11th, 12th
Rated 4 out of 5
October 5, 2023
Great thinking task for students...and love that they had to justify their answers.
Shaun K.
40 reviews
Grades taught: 8th
Mr Conceptual Understanding
Response from
Mr Conceptual Understanding
(TPT Seller)
Oct 30, 2023
I am glad you used this task to get students to think and justify their answers. Thank you!
Rated 5 out of 5
January 3, 2022
Great resource. Thank you
243 reviews
Grades taught: 9th, 10th

Questions & Answers

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Standards

to see state-specific standards (only available in the US).
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.
Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles. For example, arrange three copies of the same triangle so that the sum of the three angles appears to form a line, and give an argument in terms of transversals why this is so.
Identify the constant of proportionality (unit rate) in tables, graphs, equations, diagrams, and verbal descriptions of proportional relationships.
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