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This Congruence Criteria for Triangles—AAS and HL lesson plan also includes:
- Congruence, Proof, and Constructions - Module Overview (PDF)
- Congruence, Proof, and Constructions - Module Overview (Doc)
- Congruence Criteria for Triangles—AAS and HL (Doc)
- Congruence Criteria for Triangles—AAS and HL (PDF)
- Congruence Criteria for Triangles—AAS and HL (Doc)
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How can you prove it? Guide classes through an exploration of two possible triangle congruence criteria: AAS and HL. Learners connect this criteria to those previous learned and also explore criteria that does not work. The activity concludes with proofs utilizing AAS and HL criteria.
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CCSS:
Designed
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Instructional Ideas
- Use a graphic organizer to record acceptable and unacceptable criteria for triangle congruence, and include examples and explanations
- Spiral examples using theorems other than AAS and HL
Classroom Considerations
- Learners should have previous experience with congruence criteria including SAS, SSS, and ASA
Pros
- Prior knowledge is used to aid in understanding of the new criteria
Cons
- Lesson does not include exploration; the content of the lesson is lecture only