Lesson Plan

Unique Triangles—Two Sides and a Non-Included Angle

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This Unique Triangles—Two Sides and a Non-Included Angle lesson plan also includes:

Construct an understanding of triangle congruence through a visual analysis. Young scholars find that given two sides and a non-included angle, sometimes two possible triangles are produced. Their analysis shows that if the non-included angle is right or obtuse, it forms a unique triangle.

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Provide individuals with a graphic organizer to record the criteria that do and do not produce unique triangles
Classroom Considerations
  • Requires construction tools to complete the activity
  • Learners should be familiar with geometric notation related to triangles
  • The 12th installment in the 29-part geometry series
Pros
  • Includes questions to stimulate higher-order thinking
  • Provides a detailed teacher guide to aid in planning
Cons
  • None
Common Core