Front

Point

Back

Location, with no shape or size and no dimension.

Name with a single capital letter.

Front

Line

Back

A collection of points with no thickness or width. One dimensional (length)

Name a line as line n or with 2 points with a line with arrows going both ways over them.

Front

Line Segment

Back

A measurable part of a line consisting of 2 endpoints.

Front

Ray

Back

A line that extends indefinitely in one direction with an endpoint.

Name a ray from the endpoint out with a one-directional line over the letters.

Front

Plane

Back

A flat surface made of points and extends indefinitely in all directions. Two-dimensional figure.

Name a plane using the italic letter in a corner or three points on the plane.

Front

Collinear

Back

Points that lie on the same line.

Front

Noncollinear

Back

Points that do NOT lie on the same line.

Front

Coplanar

Back

Points that lie on the same plane.

Front

Non-Coplanar

Back

Points that do NOT lie on the same plane.

Front

Congruent Segments

Back

If 2 segments have the same length, they are congruent.