Essentials of Geometry

It has no dimension and is one of the undefined terms of geometry.

• Segment

• Ray

• Line

• Point

• Collinear

Points that lie on the same straight line.

• Plane

• Coplanar

• Collinear

• Parallel

• Perpendicular

It is a straight arrangement of points extending without end in opposite directions.

• Point

• segment

• Ray

• Line

• Collinear

It is formed by two rays that intersect at a common

endpoint

• Angle

• Complimentary

• Parallel

• Plane

• Line

Two angles are _________ when the sum of their measures is 90°.

• Parallel

• Collinear

• Complimentary

• supplementary

• Perpendicular

It is a part of a line that consists of two points called endpoints and all of the points between those endpoints.

• Ray

• Segment

• Line

• Coplanar

• Plane

It is part of a line that consists of a point called an endpoint and

all points on the line that extend in one direction.

• Point

• Segment

• Ray

• Line

• Plane

Two angles are _________ when the sum of their measures is 180°.

• Complimentary

• Supplementary

• Parallel

• Perpendicular

• Plane

A flat, two-dimensional surface that extends infinitely far in all directions.

• Point

• Segment

• Ray

• Plane

• Line

A set of points, lines, line segments, rays or any other geometrical shapes that lie on the same plane.

• Collinear

• Coplanar

• Angle

• Ray

• Segment