| 1. Begin with a circle, but no center point. |
|
| 2. Draw chord AB. |
|
| 3. Construct the perpendicular bisector of chord AB. Let C and D be the points where it intersects the circle. (Refer to the construction of a perpendicular bisector.) |
|
| 4. Chord CD is a diameter of the circle. Construct point P, the midpoint of diameter CD. Point P is the center point of the circle. (Refer to the construction of a the midpoint of a line segment.) |
|