Stuck with triangle proofs? Take a 180° and provide learners with a guided worksheet that tests their knowledge with triangle inequalities. The questions require different types of proofs that range in levels of difficulty. 

Concepts

exterior angles, interior angles, triangle properties, geometric proofs, triangles inequalities

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Additional Tags

math

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Instructional Ideas

• Use the handout as a note guide, and assign some of the material for homework
• Use the answer key to help set up the problems

Classroom Considerations

• Make sure the material is appropriate for all levels of class members

Pros

• Comes with a complete, fully worked out answer key
• Nicely organized worksheet that contains plenty of room to show the work

Cons

• None

Common Core

HSG-CO.C.9 HSG-CO.C.10