How Do You Find the Center of a Circle?

The center of the circle is the center of attention for the resource. A brief video in the Socratica Geometry playlist shows how to find the center of a circle not on the coordinate plane. The method here is to construct the perpendicular bisector of two chords and see where they intersect.

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CCSS: Adaptable
Additional Tags
Instructional Ideas
  • Have the class find centers of circles using a compass and straightedge
Classroom Considerations
  • Learners must be familiar with chords and perpendicular bisectors
  • Pupils should also have knowledge of systems of equations
Pros
  • Thorough explanations make the concept clear
  • Different colors help distinguish between line segments
Cons
  • None
Common Core