English: Three circles are shown in black. Their centers are (-2, -1), (4,0) and (-1, 4) and their radii are 1, 2 and 3, respectively. The three blue lines are their radical axes, which meet at a single point, the radical center, here at (0.621, 0.276). There is a orthogonal circle centered on the radical center that intersects all three black circles orthogonally, i.e., at right angles. The radius of the orthogonal circle is here 2.738. The radical center and the orthogonal circle are both shown in orange.