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How to find the center of a circle

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Distance & Perpendicular Bisectors To find the center of a circle, you must use perpendicular bisectors. The perpendicular bisectors of any two points on a circle always intersect in the middle. A perpendicular bisector is a line intersecting the middle of a chord on a circle with a 90( angle. Somewhere on any one perpendicular bisector is the center, so where the two perpendicular bisectors intersect, that is the center. The two points are Pink The other two points are Orange The perpendicular bisector is Green The Center is Blue Any point on the outside of a circle is always the same distance from the center.

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