GEOMETRY TERMS

Point

A dot with no size-it only

represents a location

Line

A figure with no thickness that

extends forever in opposite

directions

Plane

A flat surface that extends

forever in all directions

Line

Segment

A piece of a line with two

endpoints

Ray

A piece of a line with one endpoint

that extends forever in one

direction

Angle

Two rays that meet at a common

endpoint called a vertex

Parallel

Lines

Lines in the same plane that never

intersect

Collinear

Points on the same line

Coplanar

Points (or other figures) in the

same plane

Non-Collinear/ non-coplanar

Points not on the same line/Points

or figures no in the same plane

Bisect/

Bisector

To cut in half/ A figure that cuts

in half

Midpoint

The middle of two points

Skew Lines

Lines in different planes that

never intersect

Vertex

(Vertices)

The point where two lines, rays, or

line segment meet

Perpendicular

Lines

Lines that intersect to form four

right angles