Geometry Basics Vocabulary

Made up of points with no thickness or width; extends indefinitely in both directions.

• Line

• Segement

• Ray

• Angle

A location with no size or shape.

• Line

• Point

• Plane

• Segment

A flat surface made up of points that extend indefinitely in all directions.

• Line

• Ray

• Segment

• Plane

Points that lie on the same line.

• Collinear

• Coplanar

• Perpendicular

• Bisector

Points that lie on the same plane.

• Adjacent

• Perpendicular

• Coplanar

• Collinear

A measurable part of a line consisting of 2 endpoints.

• Line

• Line Segment

• Ray

• Angle

A line, ray, or segment that divides an angle or segment into 2 equal parts.

• Ray

• Linear Pair

• Perpendicular

• Segment Bisector

A part of a line that extends indefinitely in one direction.

• Line

• Ray

• Segement

• Point

The intersection of two rays at a common endpoint.

• Angle

• Ray

• Line

• Plane

2 angles that share a common vertex and side.

• Supplementary Angles

• Adjacent Angles

• Perpendicular

• Vertical Angles