Reflection: Staircase of Complexity Precious Parallelograms - Section 3: Proving Properties of Parallelograms - Pair Share #1 and #2


After completing the first proof in class with my students, my students seemed confident and ready to proceed to the second challenging proof.  I let my students work in pairs to complete this proof , I realized that many of my students were truly struggling with seeing patterns and recognizing parallel lines, transversal and angles that were congruent.  Hence, I quickly provided some scaffolding steps to help them.

Hence, I created a scaffolded proof for example #2 in these class notes:  Scaffolded Proof Example.   For students who need a challenge, the unscaffolded proof really pushes them, only you know your students best and who needs and does not need the support. 

  Staircase of Complexity: Creating More Scaffolded Proofs
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Precious Parallelograms

Unit 6: Pretty Polygons
Lesson 2 of 8

Objective: SWBAT prove key theorems relating to parallelograms, like opposite sides are congruent and opposite angles are congruent

Big Idea: Proofs + Parallelograms = Pretty Pairing! Students prove that opposite sides in a parallelogram are congruent and that opposite angles are also congruent.

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10 teachers like this lesson
  80 minutes
tn parallelogram image
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