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.

Concepts

circles, center, chords

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Additional Tags

math

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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

• This video is hosted on YouTube

Pros

• Thorough explanations make the concept clear
• Different colors help distinguish between line segments

Cons

• None

Common Core

HSG-C.A.2