Two chords intersect at a point inside a circle that is not the center of the circle Which statement must be true O The measures of each pair of opposite arcs sum to 180 O Each angle measure is equal to the measure of the arc it intercepts O The sum of the measures of each pair of vertical angles is equal to the sum of the measures of the intercepted arcs O Each arc measure is equal to one half the sum of the vertical angles that intercept the arc