Basic Geometry Terms

Front

Point

Back

An exact position in space

Front

Line

Back

Straight, 1-dimensional figure that extends forever in both directions

Front

Plane

Back

2-dimensional, flat surface that goes on to infinity

Front

Collinear

Back

Two or more points on the same line

Front

Coplanar

Back

Two or more figures on the same plane

Front

Line Segment

Back

Path between 2 points that has a definite length

Front

Endpoints

Back

Point at which a segment ends

Front

Intersection

Back

Where 2 lines (or 2 planes, or a line and a plane) cross

Front

Segment Addition Postulate

Back

A line segment that is divided into smaller segments will be equal to the sum of those smaller segments.

Front

Angle

Back

Figure formed by 2 rays, or sides, with a common endpoint