A collinear set of points is a set of points all of which lie on the same straight line. A noncollinear set of points s a set of three or more points that do not all line on the same straight line. A Line has no end points. A Ray has one end point. . Line Segment has two end points Congruent segments are segments that have the same measure. The Midpoint of a line segment is a point of that line segment that divides the segment into two congruent segments.
The Bisector of a line segment is any line, or subset of a line that intersects the segment at the midpoint. An Angle is a set of points that is the union of two rays having the same endpoint.
