Secant line point a "tangent line" and in no points an "exterior line". A "chord" of a circle is the line segment that joins two distinct points of the circle. A chord is therefore contained in a unique secant line and each secant line determines a unique chord. In rigorous modern treatments of plane geometry, results that seem obvious and were assumed (without statement) by Euclid in his treatment, are usually proved. For instance, "Theorem (Elementary Circular Continuity)": If formula_1 is a circle and formula_2 a line that contains a point that is inside formula_1 and a point that is outside of
Circle Line Downtown Islands until 2008, when the franchise was awarded to Statue Cruises. After the September 11, 2001 attacks, Meyer and Moran, sought to lend a hand in the revitalization of lower Manhattan. The two founded Circle Line Harbor Cruises, LLC., known in the global tourism community as Circle Line Downtown in 2004. On November 3, 2008 New York Water Taxi announced that they had purchased Circle Line Downtown. In January 2017, Circle Line Sightseeing Cruises purchased New York Water Taxi and the Circle Line Downtown brand, reuniting both Circle Lines under one owner. Circle Line Downtown operates the Zephyr Express, a