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Given three noncollinear points, construct the circle that includes all three points.
Or, construct the circumcircle of a given triangle.
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1. Begin with points A, B, and C.
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2. Draw line segments AB and BC.
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3. Construct the perpendicular bisectors of line segments AB and BC. (Refer to the perpendicular bisector construction.) Let point P be the intersection of the perpendicular bisectors.
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4. Center the compass on point P, and draw the circle through points A, B, and C.
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This same construction results in the circumcircle of ΔABC.
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