Points that lie on the same line.
Points that do not lie on the same line.
Part of a line consisting of two points, called end points, and the set of all points between them.
Congruent Line Segments
Line segments that have equal lengths.
Betweenness of Points
If F, G, and H are collinear, and if FG+GH=FH, then G is between F and H.
Part of a line consisting of a given point, called the end point, and the set of all points on one side of the end point.
The union of two rays having the same end point. The end point is called the vertex of the angle; the rays are called the sides of the angle.
Angles that have equal measures.
Betweenness of Rays
Ray PS is between ray PQ and ray PR, if point S lies in the interior of angle QPR and measurement of angle SPR plus measurement of angle QPS equals measurement of angle QPR
An angle with a measure of 90