Congruent Triangles Proofs Puzzles – Geometry Activity

Students piece together each step of congruent triangle proofs in this hands-on high school geometry activity. The puzzles cover two-column proofs, flowchart proofs and paragraph proofs, and they use the congruence postulates SSS, SAS, ASA, AAS and HL.

How it works

The activity includes multiple puzzles with cut-out pieces. Students match statements and reasons and organize the pieces to complete proofs about triangle congruence, so they are physically arranging the proof as they reason through it.

Because the puzzles come in three proof formats, students build well-rounded proof skills. Use the activity for group work, independent practice or a quick formative assessment.

What’s included

• Proof puzzles in two-column, paragraph and flowchart formats
• Pre-cut cards for easy setup
• Answer key for efficient grading

Quick facts

• Skill: triangle congruence proofs using SSS, SAS, ASA, AAS and HL
• Grades: 8–10
• CCSS: HSG-CO.C.9, HSG-CO.C.10
• Answer key: included

Bundles and related resources

You can also get these puzzles in my Congruent Triangles Geometry Curriculum Unit.

Free resources

Get my free Warm Up Slides templates.

Terms of use

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