Triangle Types: Trying Triangles

This is one lesson in a larger Unit Plan that covers many properties of triangles and several other theorems.  It has proofs, real world problems, constructions, a unit project, assessments, and more.  In Lesson 6, Trying Triangles (Triangle Types), students explore triangle classifications.  The entire unit plan can be found here. This lesson has 2 hands-on activities: one for Triangle Inequality Theorem, and an origami crane. It also has classification with examples and counterexamples.

Standards & Objectives

Essential and guiding questions: 

Essential Questions:

  • Why study triangles?
  • How would the world be affected with the elimination of triangles?

Lesson Variations

Blooms taxonomy level: 
Applying

Helpful Hints

Materials:

  • Worksheets
  • Drinking Straws (dry spaghetti, etc.)
  • Rulers
  • Squares of Plain White Paper
  • Journals

References

Contributors: