Median Concurrence Proof

Develop a proof to show what appears to be true in a drawing actually is true. The assessment asks pupils to draw the three medians of a triangle. Learners develop a proof showing that the point of intersection in their drawing is actually shared by all three medians.

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CCSS: Designed
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Instructional Ideas

  • Group individuals that used a similar approach and have them work together to solidify a proof
Classroom Considerations

  • The class should be comfortable using similar triangles in proofs
  • Class members need to know how to find a median

  • The key shows two different proofs
  • Figure contains the midpoints

  • None
Common Core