Proving Congruent Diagonals

There's something special about the diagonals of rectangles. Young mathematicians prove a theorem about a given rectangle. Specifically, they must show that the diagonals are congruent.

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CCSS: Designed
Instructional Ideas

  • Use the resource as part of a unit assessment
Classroom Considerations

  • Learners should have experience with proofs
  • Individuals must also know properties of parallelograms and rectangles
Pros

  • Includes rubric with sample responses
Cons

  • Only one problem on worksheet
  • PDF version of the rubric has portions that are illegible
Common Core