Angles from the same arc in the same segment are equal.[br][br]In plain terms:[br][br]All angles from the [minor] arc between Points A and B will be the same when they converge on any point on the circumference of the circle.[br][br]The Angle [math]\angle[/math]AOB as indicated by the dotted lines (technically known as Radii) will be twice that of the angle at any point on the circumference from A and B.