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Lesson Plan

Angle Sum Property of Triangles

Curated and Reviewed by Lesson Planet

All triangles have some things in common. Using these properties of triangles, learners find missing angle measures. Scholars use the Angle Sum Property and properties of special triangles throughout the lesson.

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CCSS: Adaptable
Concepts
triangle sum theorem, triangles, triangle properties, isosceles triangles, equilateral triangles, inscribed angle
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Additional Tags
math
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Instructional Ideas
  • Use the resource to create a guided notes document
  • Use practice problems as board work to check for understanding and fix misconceptions
Classroom Considerations
  • Uses concepts from the previous lesson in a 16-part series of geometry lessons
Pros
  • Uses scaffolding to progress to the more difficult problems
  • Provides a variety of questioning techniques to help learners build an understanding of the concepts
Cons
  • Does not include application questions or examples
Common Core
HSG-CO.C.10