Originally Posted by
HallsofIvy You can't- it's not equidistant from the three points. You can show that by calculating the three distances from that point to A, B, and C. The distance from (0,1/2) to A and B is 3/2 for both but the distance from (0, 1/2) to C is NOT 3/2. To find the point equidistant from three point, average the coordinates of all three points- ((2+ 2+ 1)/3, (2- 1- 1)/3) ("averaging" does not work for more than three points). To show that is the equidistant point, again- calculate the three distances.