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.

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