Power of a point P intersects the circle at A and B, the endpoints of the diameter. Their respective products of distances are equal to each other and to the power of point P in that circle This equality is sometimes known as the ""secant-tangent theorem"", ""intersecting chords theorem"", or the ""power-of-a-point theorem"". The power of a point is used in many geometrical definitions and proofs. For example, the radical axis of two given circles is the straight line consisting of points that have equal power to both circles. For each point on this line, there is a unique circle centered on that point
Circle Line Downtown Circle Line Downtown Circle Line Downtown is a sightseeing harbor cruise company that operates out of the South Street Seaport Pavilion Pier at the Financial District in Manhattan under Harbor Experience Companies. Circle Line Downtown was established by President J.B. Meyer, third generation owner and operator of the family that founded the company and Circle Line Sightseeing Cruises brand. In 1953, Frank Barry, Gerald O'Driscoll, Helen Mitchell, William Moran, and Frank Clair founded Circle Line, the nautical sightseeing operation, providing cruises which circled Manhattan. The company's fleet was then a collection of modified craft, including surplus landing crafts from World