A figure formed by two rays with a comomon endpoint.

Points that lie on the same line.

Points that lie in the same plane.

A point at an end of a segment or the starting point of a ray.

Points that do not lie on the same line.

Points that do not lie on the same plane.

Two rays that have a common endpoint and form a line.

An undefined term in geometry, a line is a straight path that has no thickness and extends forever.

An undefined term in geometry, it names a location and has no size.

A statement that is accepted as true without proof. Also called an axiom.

A part of a line that starts at an endpoint and extends forever in one direction.

A part of a line consisting of two endpoints and all points between them.

A basic figure that is not defined in terms of other figures. The undefined terms in geometry are point, line, and plane.