Circumcenter of a Triangle

This Circumcenter of a Triangle lesson plan also includes:

Your geometry learners will discover and show the construction of the circumcenter of a triangle. Guided by the steps in the activity, they construct perpendicular bisectors of each side that have a point of concurrency called the circumcenter. 

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CCSS: Designed
Instructional Ideas

  • As an extension to this lesson, ask learners to inscribe a triangle in a circle. The circumcenter is equidistant from each of the triangle's three vertices and is the center of the circle. The radius of the circle is the distance between the center and the vertices.

Classroom Considerations

  • Have patty paper and/or a compass and straight edge available for learners

  • Includes very detailed description of the solution
  • Helpful commentary for the teacher

  • None
Common Core