Congruent Triangles Unit – High School Geometry Curriculum

Geometry Unit 4 is a big one: 8 lessons and 12 activities for teaching congruent triangles, with guided notes, practice and assessments. It runs from SSS, SAS, ASA and AAS to right triangle congruence (HL), and includes CPCTC proofs and practice.

Topics covered

The 8 lessons cover triangle basics, congruent figures, SSS, SAS, ASA, AAS, HL and CPCTC.

How the unit works

The guided notes break each concept into step-by-step explanations with fill-in-the-blank sections, so students are working with the material and staying organized as they write. Visual aids, clear definitions and practical examples are built in.

Around the notes, the unit has:

• Structured spiral daily warm-ups (bell ringers) and exit tickets to keep students focused
• Multiple practice worksheets for independent practice and skill reinforcement
• Hands-on activities: puzzles, cut-and-paste tasks, mazes and proofs
• Stations, scavenger hunts and coloring proofs for active practice
• Quizzes, exit tickets and formative assessments to check for understanding at every step, and a final unit assessment
• Answer keys for all activities and assessments
• A pacing calendar, detailed outlines and other planning resources
• An editable version you can customize for your needs

What’s included

• An outlined planning calendar
• Weekly warm-up recording sheets
• Weekly exit ticket sheets
• Blank lesson plan template
• Unit vocabulary sheet
• Unit pre-assessment, post-assessment and quizzes
• Warm-ups
• Exit tickets
• Guided notes
• 12 activities (a $28 value alone)
• Practice assignments
• Student tracking pages for each lesson
• Worked-out answer keys
• A complete PDF of the unit
• An editable PPT version of the unit

Activities included

• Angle-Side-Angle (ASA) and Angle-Angle-Side (AAS) Cut and Paste Activity
• Congruent Figures Matching Activity
• Congruent Triangles Proofs Puzzles
• Hypotenuse-Leg (HL) Theorem Cut and Paste
• Isosceles and Equilateral Triangles Maze
• Overlapping Triangles Matching
• Paper Airplane Design and Research Project
• Side-Side-Side (SSS) and Side-Angle-Side (SAS) Cut and Paste Activity
• Triangle Angle Sum Theorem Coloring Activity
• Triangle Basics Math Stations
• Triangle Congruence Shading Activity
• Triangle Congruence Theorems Reference Sheet & Practice

Quick facts

• Topic: triangle congruence
• Grades: 8–11
• CCSS: 8.G.A.2, 8.G.B.7, HSG-CO.B.7, HSG-CO.B.8, HSG-CO.C.9, HSG-CO.C.10, HSG-CO.D.12, HSG-CO.D.13, HSG-SRT.A.3, HSG-SRT.B.4, HSG-SRT.B.5, HSG-SRT.C.6, HSG-MG.A.3
• Answer key: included

Free resources

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Terms of use

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