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No Prep Congruent Triangles and Similar Triangles Unit for High School Geometry
No Prep Congruent Triangles and Similar Triangles Unit for High School Geometry
No Prep Congruent Triangles and Similar Triangles Unit for High School Geometry
No Prep Congruent Triangles and Similar Triangles Unit for High School Geometry
No Prep Congruent Triangles and Similar Triangles Unit for High School Geometry
No Prep Congruent Triangles and Similar Triangles Unit for High School Geometry
No Prep Congruent Triangles and Similar Triangles Unit for High School Geometry
No Prep Congruent Triangles and Similar Triangles Unit for High School Geometry
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What others say

"I used part of these notes to supplement my materials teaching congruence and geometry topics to an integrated math classroom. I plan to use this unit bundle to teach the entire unit next school year."
star
Max S.

Description

Looking for a complete, ready-to-use unit on congruent triangles and similar triangles for Geometry? This resource includes everything you need to help students master triangle congruence, similarity, proofs, and proportional relationships. Perfect for on-level or lower-level/special education math classes! This unit includes guided notes, practice worksheets, quizzes, a unit test, activities, posters, video lessons, and all answer keys to ensure a complete and engaging learning experience!

Topics Covered:

✅ Congruent triangle shortcuts (SSS, SAS, ASA, AAS, HL)
✅ Congruent triangle proofs (with and without CPCTC)
✅ Congruent triangle measures with algebra
✅ Similar triangle shortcuts (SSS, SAS, AA)
✅ Using proportions to solve for sides
✅ Triangle Proportionality Theorem
✅ Triangle Midsegment Theorem
✅ Similar triangle application problems
✅ Similar triangle proofs

This is a complete congruent and similar triangles unit for Geometry. This is the 4th unit in my Geometry curriculum.

*Note: This unit is best suited for on-level or lower-level/special education math classes. Supplements will most likely be needed for an honors or upper-level math class.

Products include:


→ Hey geometry teacher! Grab 6 days of FREE circle lessons. Click here to send them to your inbox.


Copyright © Lindsay Bowden.

Permission to copy for single classroom use only. This product should only be used by the teacher who purchased it. This product is not to be shared with other teachers. Please purchase additional licenses if you intend to share this product or if this is to be used by more than one teacher.

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You can receive TPT store credits to use on future purchases by leaving feedback on products you buy! Just click on "My Purchases" under "Buy"!

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No Prep Congruent Triangles and Similar Triangles Unit for High School Geometry

$29.70
$33.00
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Highlights

Subjects icon
Subjects
Standards icon
Standards
Pages
70+
Answer Key
Included

What others say

"I used part of these notes to supplement my materials teaching congruence and geometry topics to an integrated math classroom. I plan to use this unit bundle to teach the entire unit next school year."
star
Max S.

Bonus

Unit Plan & Video Lesson Links

Description

Looking for a complete, ready-to-use unit on congruent triangles and similar triangles for Geometry? This resource includes everything you need to help students master triangle congruence, similarity, proofs, and proportional relationships. Perfect for on-level or lower-level/special education math classes! This unit includes guided notes, practice worksheets, quizzes, a unit test, activities, posters, video lessons, and all answer keys to ensure a complete and engaging learning experience!

Topics Covered:

✅ Congruent triangle shortcuts (SSS, SAS, ASA, AAS, HL)
✅ Congruent triangle proofs (with and without CPCTC)
✅ Congruent triangle measures with algebra
✅ Similar triangle shortcuts (SSS, SAS, AA)
✅ Using proportions to solve for sides
✅ Triangle Proportionality Theorem
✅ Triangle Midsegment Theorem
✅ Similar triangle application problems
✅ Similar triangle proofs

This is a complete congruent and similar triangles unit for Geometry. This is the 4th unit in my Geometry curriculum.

*Note: This unit is best suited for on-level or lower-level/special education math classes. Supplements will most likely be needed for an honors or upper-level math class.

Products include:


→ Hey geometry teacher! Grab 6 days of FREE circle lessons. Click here to send them to your inbox.


Copyright © Lindsay Bowden.

Permission to copy for single classroom use only. This product should only be used by the teacher who purchased it. This product is not to be shared with other teachers. Please purchase additional licenses if you intend to share this product or if this is to be used by more than one teacher.

Did you know?

You can receive TPT store credits to use on future purchases by leaving feedback on products you buy! Just click on "My Purchases" under "Buy"!

Connect with me!

Blog

Instagram

Facebook

Pinterest

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

4.9
Rated 4.94 out of 5, based on 17 reviews
17
ratings
5
16
4
1
3
0
2
0
1
0
Mostly used with 9th and 10th grades
Reviews
1
6
8
3
1
8th
9th
10th
11th
12th
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Great no prep!
Rated 5 out of 5
May 6, 2026
Loved this for a unit, it was easy to use for the students and myself.
Kathleen A.
53 reviews • Oregon
Grades taught: 9th, 10th
Student populations: Emerging bilinguals, Learning difficulties, Mild to severe disabilities
Love your stuff
Rated 5 out of 5
January 23, 2026
Always a great resource! Love your work! Always looking for more from you!
Susan York
(TPT Seller)
276 reviews • Florida
Grades taught: 4th, 11th
Student populations: Autism, Learning difficulties, Mild to severe disabilities
Well Organized
Rated 5 out of 5
August 22, 2025
Met expectations
Great value
Standards-aligned
Thank you! The notes and assessments were well organized and easy to follow.
Rachel L.
177 reviews • North Carolina
Grades taught: 9th, 10th
Student populations: Autism, Learning difficulties, Mild to severe disabilities
Rated 5 out of 5
April 25, 2025
I used part of these notes to supplement my materials teaching congruence and geometry topics to an integrated math classroom. I plan to use this unit bundle to teach the entire unit next school year.
Max S.
62 reviews
Grades taught: 9th
Rated 5 out of 5
July 25, 2023
I bought this bundle and liked it so much, I went back and bought the entire course.
Theresa S.
39 reviews
Grades taught: 10th
Rated 5 out of 5
April 17, 2023
This resource allowed me to complete this unit, one of my least favorites, with confidence and little preparation. It helped my students to understand the concepts. The notes were easy for my students to follow along and understand. The activities were engaging.
Angela B.
20 reviews
Grades taught: 10th
Student populations: Learning difficulties
Rated 5 out of 5
March 18, 2023
I love the crispness of all of the diagrams. My students are those who historically struggle in math, but this was right on par for them and I had more engagement than I usually do!
Eight Gone Sideways
(TPT Seller)
89 reviews
Grades taught: 11th, 12th
Student populations: Learning difficulties
Rated 5 out of 5
March 12, 2023
This was a great resource. Tasks cards were a great review. The planning guide was easy to follow. Thank you!
Jennifer S.
260 reviews
Grades taught: 8th
Student populations: Learning difficulties

Questions & Answers

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Standards

to see state-specific standards (only available in the US).
Use the definition of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and corresponding pairs of angles are congruent.
Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions.
Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar; explain using similarity transformations the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides.
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