Point
Indicates a location and has no size
Line
Represented by a straight path that extends in two opposite directions without end and has no thickness. Many Points.
Plane
Represented by a flat surface that extends without end and has no thickness. Many Lines.
Collinear Points
Point that lie on the same line
Coplanar
Points and lines that lie in the same plane
Segment
Part of a line that consists of two endpoints and all points between them
Ray
Part of a line that consists of one end point and all the points of the line on one side of the endpoint
Opposite Rays
Two rays that share the same endpoint and form a line
Mid-point
Point that divides a segment into two congruent segments
Vertex
The end point
Congruent Angles
Angles with the same measures
Adjacent Angles
Two coplanar angles with a common side, a common vertex, and no common interior points.
Vertical Angles
Two angles whose sides are opposite rays
Complementary Angles
Two angles have a sum of 90
Supplementary Angles
Two angles have a sum of 180
Linear Points
A pair of adjacent angles whose noncommon sides are opposite rays. The angles of a linear pair form a straight line.
Angle Bisector
Ray that divides an angle into two congruent angles