Lesson plan

Prove and apply that the diagonals of a parallelogram bisect each other by using congruent triangles

  • From LearnZillion
  • Created by
  • Standards
  • Tags:
teaches Common Core State Standards HSG-CO.C.11 http://corestandards.org/Math/Content/HSG/CO/C/11
Print / PDF

You have saved this lesson plan!

Here's where you can access your saved items.

Dismiss
Press ESC or click here to exit full screen

Tip: swipe on touch devices, use your keyboard's ← and → arrow keys, or clicker buttons to quickly navigate the lesson plan

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson plan.

Big Ideas: Congruent triangles can be used to prove properties of parallelograms. In this lesson students will observe that the diagonals of a parallelogram bisect each other. They will use their knowledge of congruent triangles and transversals to formally prove this observation. Vocabulary: parallelogram, opposite angles, opposite sides, congruent, congruent triangles, bisect Special Materials: Parallelograms for students to cut out, measure, etc. Scissors Rulers Protractors Graph Paper (optional)