Dunkirk - Student Encyclopedia (Ages 11 and up) An important commercial seaport, Dunkirk lies in the extreme north of France on the Strait of Dover. In the evacuation of Dunkirk, one of the great actions of World War II, the town was demolished, but much of it had been rebuilt by 1953.
A line segment is a part of a line that is bounded by two distinct end points and contains every point on the line between its end points. Depending on how the line segment is defined, either of the two end points may or may not be part of the line segment.
Theorem 2. Every secant segment is divided into two segments by the circle it intersects. The internal segment is a chord, and the external segment is the segment with one endpoint at the intersection of the secant segment and the circle, and the other endpoint at the fixed point outside the circle.