
 Three Points Define a Circle.
 Line segments (S0, S1) between A, B, and C are drawn.
 The perpendicular bisectors (d,c) of these segments are drawn.
 Do you know how to draw a perpendicular bisector?
 The intersection of these lines, F, is the center of the circle.
 Use the cursor to move points A, B, and C to see how the circle is defined for different arrangments of the points.
