Chapter 1 Geometry Vocabulary

Front

Point

Back

Location in space that has no size.

Front

Line

Back

An infinite number of points on a straight path extending in two directions.

Front

Plane

Back

An infinite number of points and lines on a flat surface that extends without end.

Front

Colinear

Back

Multiple points on the same line.

Front

Coplanar

Back

Points and lines that are on the same plane.

Front

Midpoint

Back

A point that divides a line segment into two equal parts.

Front

Line Segment

Back

Part of a line with two endpoints; does NOT extend.

Front

Ray

Back

Part of a line with one endpoint; extends in one direction.

Front

Opposite Rays

Back

Two rays on the same line that share an endpoint.

Front

Angle

Back

Two rays extending in two different directions that share an endpoint.